I 835 ^C45- :£! 't^^ 'f"^^^' sz: £?: let UJ ir| > 03/ Cornell llmvej:j$itg Jilrt;at:g BOUGHT WITH THE INCOME FROM THE SAGE ENDOWMENT FUND THE GIFT OF Henrg 119. Sa^e 1891 R.z'zu^ .^s. 'aT. 9963 D^TE DUE '«n^ '^T^HDu-^ s\\ 1 1 — 1 1 GAYLORO PBINTEOINU.S.A. FEOM THE ASTRONOMICAL JOURNAL. Nos. 179-80. CATALOGUE OF YAEIABLE STAES, By S. C. CHANDLER. Thirteen years have passed since the appearance of Schon- feld's Second Catalogue of Variable Stars. A work that shall represent the knowledge of to-day as that did the knowledge of its date is an urgent need of this branch of astronomy. The attainment of the same thoroughness of construction as for the catalogue of 1875 would require that it should emanate from the same hand : for any other to undertake the task might seem presumptuous, were the need not so immediate. I shall not apologize, therefore, for the attempt to meet the emergency partially, by the present catalogue, premising that it is to be regarded as a preliminary publication, the defects of which are to be remedied in a subsequent edition, when the series of observations and de- finitive investigations now in hand shall be completed. This catalogue is not a mere compilation ; otherwise it would scarcely be worth while to add to the number of lists which have appeared from time to time, constructed on the easy method of copying bodily the data of Schonfeld's work, with additions engrafted thereupon which, sometimes at least, do not suggest a high degree of emulation of the conscientious and critical care of construction typical of the original work. The preparation of the present work involved, as the first step, the collection of all the published observations of the known variables sihce their discovery, including the unpub- lished results of my own observations, which relate, at one time or another, nearly to the whole list of variables visible in this latitude. It is the more or less complete discussion of this material which has, in general, furnished the values of the elements of the light-variations assigned in the cata- logue. Where the results of other investigators have been adopted, they have been scrupulously accredited, as herein- after described. In the eleventh and twelfth columns of the catalogue are given the maximum and minimum brightness, with their previously observed extremes, derived from a scrutiny of the data so collated, and expressed in the prevailing scale of magnitude, namely, that of the Uranometria Nova, the Durchmusterung, the Uranometria Argentina, and the South- ern Durchmusterung. Where the data unavailable to Schon- FELD afforded no good reason for varying the limits given in his catalogue, the latter were retained unaltered, an asterisk being aflBxed thereto, to indicate this fact. The elements in the thirteenth, fourteenth and fifteenth columns, namely, the principal epochs of minimum and maximum and the periods, together with the terms depend- ing on the higher powers, or on periodic functions of the time, in the column of remarks, are the results of original investigation in all cases where an asterisk or dagger is not affixed to the period, in the fifteenth column. The asterisk denotes that Schonfeld's elements have been adopted, either from his catalogue, or from his subsequent determinations ; a course which I have followed whenever it was manifest, upon examination, that no essential improvement could be obtained from the observations now at hand, or that the time required for the calculation of new elements would too long delay the publication of the present edition of this catalogue. Similarly, a dagger is affixed wherever the elements depend on any other authority, quoted in the column of remarks. Lest it might appear that there are exceptions to the truth of the above statement, and that there are numerous cases in which credit is not here given, it is necessary to Say that the list of variables published by Professor Pickeking in 1884, and reprinted from year to year, was simply copied from my catalogue in one of its earlier stages. The manuscript for this, prepared for my private use, I lent to him with per- mission to employ it as he pleased, disclaiming, however, responsibility for the manner in which it appeared. This accounts for the fact that many of the elemen' ere given for the variables discovered since 1875 are iaentical with values which have already appeared elsewhere, but are not here distinguished by a dagger. The results of my investigations upon the elements here incorporated are of very different orders of approxima- tion to what may be considered the best attainable ni^ merical values. Sometimes they were reached sin; y T) (2) comparing the observations since 1875, or thereabouts, with Schonfeld's elements, and finding the new epoch from the mean of these corrections, and the new period from the comparison of this with his epoch. In a far larger number of instances, however, the discussion was of a more elaborate character, partaking of the nature of a definitive computation in many cases. I have already printed, in various places, the details of some of these determinations, and shall do the same for others as opportunity serves. I hope to be able, within a year or so, to issue a second edition of this catalogue which shall contain final elements of all the known variables, and which shall also be more precise and complete in other respects. An analysis of the catalogue shows that, of the two hun- dred and twenty-five stars comprised in it, one hundred and sixty are distinctly periodic. In twelve others the peri- \ odic character is rather uncertainly defined. Fourteen are distinctly irregular, that is, are either not periodic or follow highly complicated and totally unrecognizable laws. Twelve belong to the so-called Novae, or have been seen at only one appearance. In regard to the remaining twenty-seven, little or nothing is known of the character of the fluctuations, the stars having been very little observed. Of the one hundred and sixty periodical variables I have been able to assign in the catalogue both maximum and minimum epochs for sixty-three stars : maximum epochs alone, for eighty-two ; minimum epochs alone, for fourteen, nine of these being of the Algol-ty'^e, ; while in one the period alone is given. The elements of one hundred and twenty-four stars are the results of my own investigations ; for twenty-two I have adopted those of ScH6NFELD,.and for fourteen those of Argelander, Gould, Parkhdrst, or others, after indepen- dent examination had shown that the data at hand would not give essentially improved values. In about one-quarter of the whole number of periodical variables for which elements are given, I have found distinct evidence of systematic departure from uniformity of period. In more than a score of these instances the deviations have a character suflSciently pronounced to enable me to develop the numerical values of the constants of periodic or secular terms, with greater or less certainty ; and these functions of the epoch have been inserted in the catalogue, either in the column containing the periods or in the remarks, as the con- venience of the available space served. It is of interest to recapitulate the present state of our knowledge in respect to these curious perturbations, the development of which is so important for the study of the causes of stellar variation. I have therefore collected in the following table, by what seems to be the most perspicuous form of statement, the inequalities incorporated in the ele- ments of the catalogue. The arrangement is in order of the length of the period in the third column, which, with its variation in the fourth column, are the values of the first and second derivatives, respectively, of the elements of the catalogue ; and therefore correspond to the instant of the beginning of the epoch E, reckoned from the zero of the principal epoch of maximum or minimum of the cata- logue. No. Star Period Variation of A = Ee + G Period e u d d d O o 4826 R Hydrae 496.91 + 6.043 cos A —0.461 E —0.004 E^ —0.453 sin A —0.461 —0.008 E 4.3 353.7 8600 R Ca^siopeae 429.00 + 6.423 cos A —1.793 sin A 16.0 346.0 7120 X Cygni 406.04 + 0.011 E + 0.011 8512 R Aquarii 387.16 + 6.110 cos A —1.066 sin A 10.0 235.0 8290 R Pegasi 378.10+0.340 E + 0.340 3477 R Leonis min. 373.50—0.066 E —0.066 5501 S Serpentis 365.25 + 4.801 cos A —0.419 sin A 5.0 30.0 5677 R Serpentis 357.60 + 3.927 cos A —0.343 sin A 5.0 15.0 2946 R Caneri 352.81 + 0.414 E + 0.414 6849 R Aquilae 352.30 0.800 E —0.800 806 Ceti 331.34+1.555 cos A —0.037 sin A 1.36 179.8 + 1.210 cos A —0.043 sin A 2.05 70.1 + 1.296 cos A —0.093 sin A 4.09 31.25 7220 S Cygni 323.30— 0.134 E —0.134 5770 R Herculis 318.40+4.189 cos A —0.877 sin A 12.0 324.0, 6044 S Herculis 309.00+7.201 cos A —0.943 sin A 7.5 100.0 3825 R Ursae Maj. 305.40—0.150 E —0.150 4557 S Ursae Maj. 223.92 + 0.204 E +0.204 3994 S Leonis 184.95 + 0.260 E + 0.260 6512 T Herculis 164.75 + 0.628 cos A —0.079 sin A 7.2 57.6 4521 R Virginis 145.63 + 0.545 cos A —0.024 sin A 2.5 135.0 + 0.353 cos A —0.028 sin A 5.0 65.0 7560 R Vulpeculae 136.90 + 1.396 cos A —0.097 sin A 4.0 90.0 (3) No. Star Period Variation of A = Eg + G Period e (i d li m s B o o758 ^ Lyrae 12 21 46 58.3 + 0.8434 E —0.0002 E^ + 0.8434 —0.0003 E 1090 § Persei 2 20 48 55.425 + 3.6296 cos A —0.0012 sin A 0.02 202.5 + 1.4137 cos A —0.0018 sin A 0.075 203.25 + 0.6109 cos A —0.0018 sin A 0.167 90.13 6189 U Ophiuchi 20 7 41.600 —0.0004 E —0.0004 Besides the stars in the foregoing table, I have detected distinct evidence of similar systematic inequalities, but with- out attempting to determine the mathematical expressions of them, in the following cases : S Gassiopeae, B Arietis, B Tauri, V Tauri, M Leporis, li Aurigae, R Ganis minoris, S Ganis minoris, B Leonis, B Gorvi, T Ursae Majoris, S Virginis, B Scorpii, U Her cults, T Delphini, T Pegasi; be- sides the well known case of B Scuti. And it is appropriate to add here that there are puzzling discordances between the minima of the Algol-type variable T Gygni observed in dif- ferent years, for which I can see at present no explanation. The fact that a large proportion of the variable stars are more or less red attracted attention early in the historj' of the subject ; and that some sort of connection between color and variability really exists is now commonly accepted, al- though the nature of the relation is not at all understood. It seems proper, therefore, that a statement of the degree of redness, expressed in some convenient, although arbitrary, numerical scale, should find place in a catalogue of these objects. In the tenth column I have attempted to do this as well as the material furnished by my observations will per- mit. In 1883 and 1884 I made a series of about one thou- sand estimates, by two independent methods, upon about one hundred and twenty of the telescopic periodical vari- ables, directed to this special end. Being a continuous series, made with the same instrument (6|-inch Clacey equa- torial) , they have a homogeneity which fits them to serve as a basis of classification of the . variables as to redness, until something better can be provided. The details of this investigation will soon be published. The results are given in the tenth column in the figures not in parentheses. The redness is expressed to tenths of a degree of an arbitrary decimal scale, the zero of which corresponds to white light, and the other limit, ten, to the most intense shade of red of which we have cognizance in the heavens, exemplified by such stars as S Gephei, V Gygni and B Leporis. As nearly as the intermediate degrees of this imaginary scale can be verbally defined, 1 corresponds to the slightest perceptible admixture of yellow with the white ; 2 to a yellow ; 3 to yellowish orange ; 4 to a full orange or orange-red ; and 5 to 10 to increasing shades of intensity up to the limit de- scribed. The results are stated to tenths of the unit, not to imply that they possess by any means that order of accuracy, but simply as the casual average of the estimates. The values for the stars not included in this series are in paren- theses ; and are merely rude attempts to assign their red- ness in the same scale, from estimates made at other times, or, where these were wanting, from descriptions by other observers. Two remarks should be added ; first, that my scale was formed independently of, and without reference to Schmidt's, and that I am not now prepared to define the relation between the two ; and secondly, that I am fully aware how vague and defective this method, of estimate by reference to an arbitrary imaginary scale, is. But it is at least a beginning, if a rude one. The whole subject is be- set with great diflflculties, and needs thorough study by cor- rect methods. The places of the stars of Schonfeld's catalogue were taken directly therefrom (correcting a misprint in t] Gemi- norum), and those of the additional stars from the most trustworthy available sources. The equinox of 1855 is re- tained, as it is still, on the whole, the most convenient. On the right hand page, however, are approximate places for 1900, which equinox will be adopted as the fundamental one in some future edition, and which has been made the basis of the method of numbering about to be described. In the outside columns of both the right and left hand pages is the number of the star, upon a system of ordinal notation designed to remedy the inconveniences attending the usual current numbers. The variables are increasing so rapidly in number that successive editions of catalogues must in future succeed each other more frequently than in the past, to serve the convenience of astronomers. A new cur- rent number with each list necessitates a reference column, for identification, of the numbers of some preceding one ; or, if the numbers of any one list are retained, the interpo- lated stars require a suflBx-letter, resulting in a hybrid nota- tion which is exceedingly objectionable, and which sooner or later has to be re-formed ; when the whole process of degen^ eration, with its awkwardness and confusion, begins anew. It seems certainly better to adopt a system which attaches a permanent numeral to each star, and which permits interpo- lation to a practically unlimited extent. I would accordingly suggest that the numbers for variable star catalogues be {Continued on page 12.) (4) No. Sch. Star 1855.0 R.A. Decl. Annual Variation Discoverer Date Red- ness Magnitude Max. Min. 100 TCeti h m s 14 26 —20 51.8 + 3.04 + 0.33 Chandler 1881 (4) 5.1- 5.3 6.4- 7.0 107 1 T Cassiopeae 15 25 + 54 59.3 3.20 0.33 Krueger 1870 7.3 7.0- 8.0 11.0-11.2* 112 2 R Andromedae 16 25 + 37 46.4 3.14 0.33 Argelander 1858 5.0 5.6- 8.6* <12.8 * 114 3 S Ceti 16 41 —10 7.9 3.05 0.33 Borrelly 1872 2.0 7.0- 8.0* <12.5 116 4 B Cassiopeae 16 47 + 63 20.6 3.27 0.33 Tycho Brahe 1572 >1 * ? # 161 5 T Piscium 24 29 + 13 48.0 3.11 0.33 Luther 1855 (0) 9.5-10.2* 10.5-11.0* 209 6 a Cassiopeae 32 18 + 55 44.5 3.36 0.33 Birt 1831 (5) 2.2 * 2.8 * 224 Andromedae 34 49 +40 28.3 3.25 0.33 Hartwig 1885 (5) 7 0? 243 U Cassiopeae 38 16 +47 27.8 3.31 0.33 Espin 1887 (6) 8i? 14? 320 U Cephei 49 39 + 81 5.6 4.90 0.33 Ceraski 1880 (0) 7.1 9.2 432 7 S Cassiopeae 19 4 + 71 50.8 4.30 0.32 Argelander 1861 6.7 6.7- 8.6 <13.5 434 8 S Piscium 10 + 8 9.9 3.12 0.32 Hind 1851 1.0 8.2- 9.3 13.5? 466 U Piscium 15 18 + 12 6.4 3.16 0.32 Peters 1880 10 <14 494 R Sculptoris 20 17 —33 17.8 2.77 0.31 Gould 1872? (9) 5| 7f 513 9 R Piscium 23 10 + 2 7.9 3.09 0.31 Hind 1850 2.0 7- 8.8 <12.5 * 715 10 S Arietis 1 56 51 + 11 49.7 3.21 0.29 Peters 1865 (2) 9.1- 9.8* 14? 782 11 R Arietis 2 7 53 + 24 22.8 3.39 0.28 Argelander 1857 1.8 7.6- 9.0 11.7-13.0 793 T Persei 9 + 58 16.7 4.23 0.28 Safarik 1882 (4) 8.2 9.3 806 12 Ceti 12 1 — 3 38.3 3.02 0.28 Fabricius 1596 5.9 1.7- 5.0* 8- 9.5 814 13 S Persei 12 29 + 57 55.2 4.24 0.28 Krueger 1873 5.0 8.5 12.5 845 14 RCeti 18 38 — 50.1 3.06 0.28 Argelander 1866 2.4 7.5- 8.8 13.5 893 UCeti 26 45 —13 47.2 2.88 0.27 Sawyer 1885 (3) 6.8- 7.3 10.5< 976 15 T Arietis 40 15 + 16 54.1 3.33 0.26 Auwers 1870 3.2 7.9- 8.6 9.3- 9.7 1072 16 p Persei 55 54 + 38 16.5 3.81 0.24 Schmidt 1854 (2) 3.4 * 4.2 * 1090 17 P Persei 2 58 45 + 40 23.6 3.87 24 ( Moiitanari i Goodricke S 1669 } 1 1782 J (0) 2.3 3.5 1222 18 R Persei 3 20 50 + 35 10.1 3.79 0.21 Schonfeld 1861 2.3 7.7- 9.2 13.5 1411 19 I Tauri 3 52 39 + 12 4.6 3.31 0.18 Baxendell 1848 (0) 3.4 * 4.2 * 1537 20 T Tauri 4 13 33 + 19 11.3 3.49 0.15 Hind 1861 (0) 9.2-11.5* 12.8-<13.5 1574 W Tauri 19 43 + 15 46.5 3.41 0.14 Espin 1886 (5) 9? <12J 1577 21 R Tauri 20 21 + 9 50.1 3.28 0.14 Hind 1849 4.5 7.4- 9.0* 13.5 1582 22 S Tauri 21 16 + 9 37.3 3.28 0.14 Oiidemans 1855 2.5 9.5-10.0 <13.5 1654 R Doradus 35 5 —62 21.8 0.69 0.12 Gould 1874? (7) H 6f 1717 23 V Tauri 43 39 + 17 17.4 3.46 0.11 Auwers 1871 3.3 8.3- 9.0* <13.5 1761 24 R Orionis 51 8 + 7 54 3 3.25 0.10 HiDd 1848 4.4 8.7- 9.1 <13 * 1768 25 £ Aurigae 51 34 f 43 36.2 4.29 0.10 Fritsch 1821 (1) 3.0 * 4.5 * 1771 26 R Leporis 4 53 —15 1.7 2.73 0.10 Schmidt 1855 9.4 6- 7 * 8.5? * 1855 27 R Aurigae 5 5 36 + 53 25.0 4.82 0.08 At Bonn 1862 6.5 6.5- 7.8 12.5-12.7* 1923 S Aurigae 17 33 +34 2.1 3.96 0.06 Dun6r 1881 6.7 9.4-11.0 <14.5 1944 28 S Orionis 21 51 — 4 48.7 2.96 0.06 Webb 1870 6.4 8.3- 9.5 13.0 1961 29 8 Oriouis 24 36 — 24.6 3.06 0.05 J. Herschel 1834 (0) 2.2? * 2.7 * 1986 T Orionis 28 43 — 5 34.5 2.94 0.05 Bond 1863 (0) 9.7 13 2100 U Orionis 47 13 + 20 8.7 3.56 0.02 Gore 1885 (7) 6.4- 7.5 <12 2098 30 a Orionis 5 47 19 + 7 22.9 3.25 + 0.02 J. Herschel 1840 (6) 1 * 1.4 * 2213 31 Tj Greminorum 6 6 8 + 22 32.6 3.62 — O.Ol Schmidt 1865 (3) 3.2 * 3.7- 4.2* 2266 V Monocerotis 15 25 — 2 7.6 3.02 0.02 Schonfeld 1883 3.4 6.9 10.7< 2279 32 T Monocerotis 17 24 + 7 9.7 3.24 0.03 Gould 1871 (2) 5.8- 6.4 7.4- 8.2 2362 33 R Monocerotis 31 15 + 8 51.7 3.28 0.05 Schmidt 1861 (0) 9.5 * 13 2375 34 S Monocerotis 33 + 10 1.5 3.31 0.05 Winnecke 1867 (2) 4.9 * 5.4 * 2478 35 R Lyncis 49 20 +55 31.6 4.97 0.07 Krueger 1874 4.8 7.8- 8.0 <13 2509 36 t, Geminorum 55 30 + 20 46.7 3.56 0.08 Schmidt 1847 (2) 3.7 * 4.5 * 2528 37 R Greminorum 6 58 37 + 22 55.4 3.62 0.08 Hind 1848 5.7 6.6- 7.8 <13.5 2539 38 R Canis min. 7 44 + 10 14.9 8.30 0.09 At Bonn 1855 5.5 7.2- 7.9* 9.5-10.0* 2583 LoPuppis 9 7 —44 24.2 1.82 0.10 Gould 1872 (8) 3.5 6.3 2610 R Canis Maj. 12 55 —16 7.6 2.70 0.10 Sawyer 1887 (0) 5.9 6.7 2625 V Geminorum 15 2 + 13 21.9 .3.37 0.11 Baxendell 1880 2.8 8.2- 9.1 12.0-14.0 2676 3> _U Monocerotis 23 53 — 9 28.6 2.86 0.12 Gould 1873 (3) 5.9- 7.3 6.6- 8.0 2684 S Canis min. 7 24 51 + 8 37.4 + 3.26 —0.12 Hind 1856 4.1 7.2- 8.0* <11 * (5) Greenwich Ii Min. dean Time Max. Period, etc. Remarks 1900.0 R.A. Decl. No. d h m d h m d h m 3 65 ? -f441 E -1-411.2 E + 322.5 E Irregular ; possibly, type of R Scuti Nova Irregular Irregular. Argel. found per. 79d Nova in Andromeda Nebula Algol-type I think period is shortening Elements uncertain ; Parkhurst Elements inferred from Cordoba obser. Sawyer has confirmed variability I suspect a shortening of period Light- curve irregular r+18d .16 810(45/110 E+ 31" IS') 4-33 .90 sin 46/22'' E-l- 70 5) +65 .31 8in(15/ii» E-h 179 48) V.Argcl. elements, omitting 10-year term Schmidt's period. Schoenfeld thinks thevar. irregular r+173m .3 8in(l/50 E'+202o .30') , + 18 .0 Bin(&/40 E'+203 15 ) + 3 6 8in(l/6 E'-H 90 20 ; l.whereE' = E -11210 Algol-type : period subject to marked inequalities Irregular Elements uncertain I suspect variation from uniform period Irregular Evidence of inequality in /leriod Period probably irregular I think period ia certainly over 400 days, but very irregular; possibly with secondary phases Possibly a secondary max. midway fAuwers found a 16d period; Schoenfeld found a ■{ slight variation, but no period. My obsns. and L Sawyer's show no fluctuation of light In Great Nebula; Schmidt's obsns. and mine con- firm variabiity Duner'fl elements Argelander found period 196 days. Schoenfeld thinks periodicity questionable Limits of mags, from Sawyer's olysns. Irregular; in southerly end of the nebular h (399) "Winnccke's elements ; Schoenfeld's obsns. partly con- flrni such a period, partly contradict it Elements uncertain fW. M. Reed's obsns. indicate a correction to Schoen- < feld's period of — Im 48s, Yendell's one of about L —30s. I have adopted —Im 22s There is evidence of inequality of period Williams's elements of max. ; min. inferred from Gould's remarks in TJ.A. Algol-type fLimits of mag. from Sawyer's obsna., which show \ light-curve resembling R Scuti ; Yendell's obsns. I. confirm Schoenfeld thought period was shortenmg, in 1875; but my results show rather a cyclical irregularity h m 16.7- 17.8 18.8 19.0- 19.2 26.8 34.8 37.2 40.5 53.4 1 12.3 12.3 17.7 22.4 25.5 1 59.2 2 10.4 12.2 14.3 15.7 20.9 28.9 42.7 2 58.7 3 1.6 23.7 3 55.1 4 16.2 22.3 22.8 23.7 35.6 46.2 53.6 54.8 4 55.0 5 9.2 20.5 24.1 26.9 30.9 49.9 5 49.7 6 8.8 17.7 19.8 33.7 35.8 53.1 6 58.2 7 l.S 3.S lO.f 14.£ 17. e 26. ( 7 27.J -20 37 + 55 14 + 38 1 — 9 53 + 63 35 + 14 3 + 55 59 +40 43 +47 43 + 81 20 + 72 5 + 8 24 + 12 21 —33 4 + 2 22 + 12 3 + 24 35 + 58 29 — 3 26 + 58 8 — 38 —13 35 + 17 6 + 38 27 + 40 34 + 35 20 + 12 12 + 19 18 + 15 53 + 9 56 + 9 44 —62 16 + 17 22 + 7 59 +43 41 —14 57 + 53 29 + 34 5 — 4 46 — 22 — 5 32 + 20 10 + 7 23 + 22 32 — 29 + 78 + 8 49 + 9 59 + 55 29 +20 43 + 22 52 + 10 11 —44 2i —16 U + 13 1' )— 9 3^ !-|- 8 35 100 107 112 114 116 161 209 224 243 320 432 434 466 494 513 715 782 793 806 814 845 893 976 1072 1090 1222 1411 1637 1574 1577 1582 1654 1717 1761 1768 1771 1855 1923 1944 1961 1986 2100 2098 2213 2266 2279 2362 2375 2478 2509 2528 2539 2583 !2610 ^2625 t2676 J 2684 83 Dec. 8 84 Aug. 10 82 Oct. 22.9 88 Nov. 13 88 Jan. 2 23 20.0 88 Apr. 27.5 88 Mar. 31.7 85 Sept. 72 Dec. 7 ? 81 Dec. 24.0 72 Mar. 14.0 82 Jan. 6.5 + 2 11 49 45.0 E + 607.5 E + 406.0 E + 352 E t + 207 E + 344.0 E + 290.0 E + 186.7 E 72 Aug. 21 ? 81 Sept. 27.6 66 Aug. 8 66 Nov. 25.47 73 Nov. 30 70 Oct. 31.4 84 Dec. 11 73 Mar. 11 + 331.3363 E+ f + 346 E + 167.1 E * + 233 E + 324 E * 33 + 2 20 48 55.425 E'+ + 210.4 E + 3 22 52 12.0 E 88 Jan. 3 7 2129.23 J87Dec. 6 1157.0 82 June 20.0 81 Nov. 26.9 83 Oct. 25 + 325.0 E +376 E 83 Nov. 7 69 Oct. 18.6 + 169.2 E + 378.8 E * 79 Jan. 24 77 May 25 69 July 1 79 Sept. 13.0 78 Jan. 6.0 70 Jan." 17 +436.1 E + 460.6 E +416 e" 85 Dec. 15 + 359.5 E t 70 April 7 + 229.1 E * + 334 E + 27.0037 E 84 Jan. 1 85 Apr. 1.81 85 Mar. 24.88 83 Aug. 20 87Dec. 29 14 5.7 76 Apr. 28 87Mar.26 14 58.5 79 Sept. 24 73Apr. 1.0 70 Jan. 31 19.9 ? 84 Jan. 26 88 Jan. 3 14 27.7 78 Apr. 18.0 76 Aug. 20 78 Mar. 16.0 + 31038E? t + 380.0 E + 10 3 41.5 E + 370.5 E + 337.5 E + 136.05 E t + 1 3 15 55 E + 276.0 E + 45.20 E +331.0 E 80 Feb. 7 73 Apr. 19.0 79 Aug. 20 (6) No. Sell. Star 18 R.A. 55.0 Decl. Annual Variation Discoverer Date Red- ness Magnitude Max. Min. 2691 40 T Canis min. h m 8 7 25 56 + 12° 3.0 +3!34 —0.12 Schonfeld 1865 (2) 9.0- 9.7 <13.5 2735 U Canis min. 33 28 + 8 42.2 3.26 0.13 Baxendell 1879 5.1 8.5- 9.0 12.3-13.5 2742 41 S Geminorum 34 20 + 23 47.2 3.61 0.13 Hind 1848 (3) 8.2- 8.7* <13.5 2780 42 T Geminorum 40 36 + 24 5.5 3.61 0.14 Hind 1848 3.0 8.1- 8.7* <13.5 2783 S Puppis 42 31 —47 45.4 1.74 0.14 Gould 1872? n 9 2815 43 U Geminorum 46 30 + 22 22.7 3.56 0.15 Hind 1855 0.0 8.9- 9.7* 13.1 * 2857 U Puppis 7 54 2 —12 26.6 2.81 0.16 Pickering 1881 3.2 8.5- 9.0 < 14 2946 44 R Cancri 8 8 34 + 12 10.1 3.32 0.18 Schwerd 1829 5.3 6.0- 8.3 <11.7 * 2976 45 V Cancri 13 27 + 17 44.5 3.43 0.18 Auwers 1870 4.3 6.8- 7.7 <12 * 3060 46 U Cancri 27 28 + 19 23.5 3.45 0.20 Chacornac 1853 2.3 8.4-10.6 <13 * 3109 47 S Cancri 35 39 + 19 33.2 3.44 0.21 Hind 1848 (1) 8.2 * 9.8 * 3170 48 S Hydrae 46 + 3 36.8 3.13 0.22 Hind 1848 2.1- 7.6- 8.7 <12.2 * 3186 49 T Cancri 48 23 + 20 24.1 3.44 0.22 Hind 1850 7.4 8.0- 8.5 9.3-10.5* 3184 50 T Hydrae 8 48 37 — 8 35.4 2.92 0.22 Hind 1851 1.8 7.0- 8.1* <13.0 3418 R Carinae 9 28 36 —62 8.9 1.52 0.26 Gould 1871 (5) 4.3- 5.7 9.3-10.0 3477 51 R Leonis min. 36 52 + 35 10.6 3.62 0.27 Sctionfeld 1863 6.0 6.1- 7.8 <12.5 3493 52 R Leonis 39 45 + 12 5.9 3.23 0.27 Koch 1782 6.9 5.2- 6.7 9.4-10.0* 3495 I Carinae 41 16 —61 50.4 1.65 0.27 Gould 1871 3.7 5.2 3567 V Leonis 9 51 57 + 21 57.3 3.36 0.28 Becker 1882 1.7 8.6 <13.5 3633 R Antliae 10 3 30 —37 1.2 2.58 0.29 Gould 1872 6.5 <8 3637 S Carinae 4 45 —60 50.4 1.92' 0.29 Gould 1871 (5) 6i 9 3712 U Leonis 16 17 + 14 44.1 3.23 0.30 Peters 1876 9.5 <13.5 3796 U Hydrae 30 24 —12 38.1 2.96 0.31 Gould 1871 (7) 4.5 6.1- 6.3 3825 53 R Ursae Maj. 34 19 + 69 32.1 4.38 0.31 Pogson 1853 1.6 6.0- 8.2 13.2 3847 54 >? Argus 39 27 —58 55.4 2.31 0.31 Burchell 1827 (5) >1 * 7.4 3881 V" Hydrae 44 34 —20 28.8 2.91 0.32 5 Gould I I Chandler 5 i 1874? ? J 1888 J (9) 6.7 9.K 3890 W Leonis 45 58 + 14 29.2 3.18 0.32 Peters 1880 9? <14 3934 55 R Crateris 10 53 26 —17 32.8 2.95 0.32 Winnecke 1861 8.1 >8 * <9 * 3994 56 S Leonis 11 3 21 + 6 14.9 3.11 0.32 Cliacornac 1856 0.0 9.0-10.0 <13 * 4160 57 T Leonis 31 + 4 10.5 3.08 0.33 Peters 1862 10? * .<13.5 4300 58 X Virginis 54 25 + 9 52.7 3.08 0.33 Peters 1871 7.8? * 12 4315 59 R Comae 11 56 49 + 19 35.4 3.08 0.33 Schonfeld 1856 4.0 7.4- 8.0* <13.5 4377 60 T Virginis 12 7 10 — 5 13.8 3.08 0.33 Boguslawski 1849 4.1 8.0- 8.8* 10-<13.5 4407 61 R Corvi 12 8 —18 26.9 3.09 0.33 Karlinski 1867 3.7 6.8- 7.7 <11.5 * 4492 Y Virginis 26 25 — 3 37.3 3.08 0.33 Henry 1874 3.6 8- 9.4 13-14 4511 62 T Ursae Maj. 29 47 + 60 17.2 2.77 0.33 At Bonn 1860 2.0 6.7- 8.5 12.2-12.6 4521 63 R Virginis 31 9 + 7 47.2 3.05 0.33 Harding 1809 1.3 6.5- 8.0 9.7-11.0 4536 R Muscae 33 17 —68 36.7 3.56 0.33 Gould 1871 6.6 7.4 4557 64 S Ursae Maj. 37 35 + 61 53.3 2.66 0.33 Pogson 1853 3.2 7.0- 8.2 10.2-11.5 4596 65 U Virginis '• 12 43 45 + 6 20.6 3.04 0.33 Harding 1831 1.1 7.7- 8.1* 12.2-12.8* 4805 66 W Virginis 13 18 33 — 2 37.4 3.09 0.31 Schonfeld 1856 0.4 8.7- 9.2* 9.8-10.4* 4816 67 V Virginis 20 19 — 2 25.2 3.09 0.31 Goldschmidt 1857 2.7 8.0- 9.0* <13 * 4826 68 R Hydrae 21 48 —22 31.8 3.27 0.31 5 Montanari > I Maraldi \ (1672> i 1704 5 5.9 3.5- 5.5 9.7 4847 69 S Virginis 25 26 — 6 26.8 3.13 0.31 Hind 1852 2.6 5.7- 7.8* 12.5 * 4948 R Canum Venat. 42 43 +40 15.9 2.58 0.30 Espin 1888 H <11 5037 RR Virginis 13 57 12 — 8 30.0 3.17 0.29 Peters 1880 >11 <14 5070 Z Virginis 14 2 33 —12 36.5 3.22 0.29 Palisa 1880 9.5- 11 <14 5095 R Centauri 6 10 —59 14.1 4.24 0.28 Gould 1871 (6) 6.0- 6.3 8.7- 9.8 5097 70 T Bootis 7 18 + 19 44.7 2.81 0.28 Baxendell 1860 9.7? * <13 * 5156 X Bootis 17 19 + 16 58.8 2.84 0.28 Baxendell 1859 (4) 9.0- 9.4 10.2 5157 71 S Bootis 18 1 + 54 28.3 2.01 0.28 At Bonn 1860 2.8 7.7- 8.5 12.5-13.2 5194 V Bootis 23 54 + 39 30.4 + 2.42 0.27 Dun6r 1884 3.6 7.1- 7.3 9.4 5190 72 R Camelopardi 28 54 + 84 29.2 —5.31 0.27 Hencke 1858 2.1 7.8- 8.6 12-13.5 5237 73 R Bootis 30 48 + 27 22.1 + 2.65 0.26 At Bonn 1858 2.7 5.9- 7.8 11.3-12.2* 5249 V Librae 14 32 18 —17 1.8 + 3.32 —0.26 Schonfeld 1882 9.3 12.2 (7) Greenwich Min. Mean Time Max. Period, etc. Remarks 19( E.A. )0.0 Dec!. No. d h m d h m 72 Feb. 3.6 80 Mar. 15 65 Nov. 3.2 63 Feb. 18.3 d h m a + 322.1 E * + 398.6 E + 294.2 E * + 288.1 E * rLaw of period very complicated. Tlie elements •i given represent obfins. since 1879, but witli con- l. siderable deviations A lengthening of the period stems beyond doubt Algol-type Elements uncertain The shortening of the period seems clearly proved ( I find good evidence of cyclical variation of period, i with a long term. Elements mere guess-work Period several months Elements are Espin's, very uncertain. Sawyer's obsns. confirm variability but give no period rElements provisional; whether the marked devia- < tions from uniform period are secular or not is L uncertain Irregular Elements very uncertain Elements inferred by Parkhurst from his observa- tions Schoenfeld finds, very uncertainly, period of leOd Elements very uncertain Periodical inequality evident Elements very uncertain Evidence of periodical irregularity r+12i.5 sin(2».6 E-hlSS') .^ -1- 4 .5 sin(5 E-1- 65 ) LElements provisional Period is Gould's; min. precedes max. 9 hours Signs of periodical irregularity C— Od.00127eE3 < -f80d.5 8in(4«.3 E-(-3B3».7) LGould has an eiitirely different law ^Schoenfeld favors assumption of secular shortening J of period ; my results show rather p eriodical irreg- l ularily Elements inferred by Parkhurst from his observa- tions Elements represent Markree observation in 1856 Period probably long and irregular Only one appearance known Duner's elements h m 7 28.4 35.9 37.0 43.3 43.8 49.2 7 56.1 8 11.0 16.0 30.0 38.2 48.3 51.0 8 50.8 9 29.7 39.6 42.2 42.5 9 54.5 10 5.5 6.2 18.7 32.6 37.6 41.2 46.8 48.3 10 55.6 11 5.7 33.3 56.7 11 59.1 12 9.5 14.5 28.7 31.9 33.4 36.0 39.6 12 46.0 13 20.9 22.6 24.2 27.8 44.6 13 59.6 14 5.0 9.4 9.4 19.4 19.5 25.7 25.1 32.8 14 34.8 1 + 11 68 + 8 36 + 23 41 + 23 59 —47 52 + 22 16 —12 34 + 12 2 + 17 36 + 19 14 + 19 24 + 3 27 + 20 14 — 8 45 —62 21 + 34 58 + 11 54 —62 3 + 21 45 —37 14 —61 4 + 14 31 —12 52 + 69 18 —59 10 —20 43 + 14 15 —17 47 + 60 + 3 56 + 9 38 + 19 21 — 5 28 —18 42 — 3 52 + 60 3 + 7 33 —68 51 + 61 39 + 66 — 2 52 — 2 39 —22 46 — 6 41 +40 2 — 8 43 2691 2735 2742 2780 2783 2815 2857 2946 2976 3060 3109 3170 3186 3184 3418 3477 3493 3495 3567 3633 3637 3712 3796 3825 3847 3881 3890 3934 3994 4160 4300 4315 4377 4407 4492 4511 4521 4536 4557 4596 4805 4816 4826 4847 4948 5037 79 Aug. 27 79 Oct. 24 81 Mar. 8 52 Apr. 21.1 84 Jan. 8.5 84 Mar. 18.6 + 86.3 E + 310 E +352.81 E+0.207E2 + 271.5 E + 305.2 E + 9 11 37 45 E * + 256.5 E + 482. E + 289.4 E * +312. 14E + 373.5 E— 0.033 E^ + 312.87E + 31.0 E + 260 E 67 Aug. 3114 2.89 78 Mar. 18.3 72 Aug. 2 66 Jan. 26.5 71 July 26.1 65 Feb. 20.0 80 Aug. 28.4 71 Aug. 1 82 April 80 Apr. 2.4 71 July 12 86 Mar. 29 85 Dec. 11.73 53 Mar. 12.5 + 194.65 E t + 305.4 E— 0.075 E^ 73 March 87 March? + 575 E +395 E ? t 61 Jan. 3.0 + 184.95 E+0.13E2 83 Sept. 15 75 Mar. 14 77 Dec. 31 84 May 82 Aug. 21.0 09 May 29.17 +362 E +337 E + 317.2 E + 210 E + 257.2 E + 145.63 E+ 2120 t + 223.92 E+0.102E'' + 207.2 E + 17.27263 E * + 251 E * + 496.91 E— 0.2307 E^ + 376.0 E 84 February 82 Apr. 30 09 Mar. 11.17 60 Feb. 4.0 82 Feb. 13.0 69 Apr. 17.466 60Mav 21.4 82 May 12.0 69 Apr. 25.666 67 Sept. 4 1764 Dee. 22.5 63 May 17.0 63 Feb. 9 86 June 80 May 25.4 + 383 E t + 302.6 E —12 50|5070| —59 27 + 19 32 + 16 46 + 54 16 + 39 18 + 84 17 + 27 10 —17 14 5095 5097 5156 5157 5194 5190 5237 5249 82 Aug. 15 80 Jan. 14 82 Nov. 7 80 June 9.0 84 Sept. 3 82 Dec. 10 80 June 23.0 + 123 E + 272.3 E + 266.5. E t + 269.5 E + 223.9 E 80 Mar. 13 (8) No. Sch. Star 1855.0 R.A. Decl. Annual Variation Discoverer Date Red- ness Magnitude Max. Min. 5274 5338 5374 5430 5438 5465 5484 5494 5501 5504 5583 5593 5617 5667 5677 5682 5675 5688 5732 5770 5776 5795 5826 5830 5831 5856 5860 5887 5889 5912 5928 5931 5950 5948 5955 6044 6083 6088 6132 6181 6189 6202 6268 6368 6472 6512 6573 6624 6633 6636 6682 6726 6733 6760 6758 6794 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 W Bootis U Bootis S Librae T Librae Y Librae R Triang. austr. U Coronae S Librae S Serpentis S Coroaae X Librae W Librae D Librae E Coronae R Serpentis R Lupi V Coronae R Librae T Coronae R Herculis X Scorpii W Scorpii T Scorpii R Scorpii S Scorpii W Ophiuchi U Scorpii V Ophiuchi U Herculis g Herculis T Ophiuchi S Ophiuchi W Herculis R Ursae min. R Draconis S Herculis Ophiuchi V Herculis R Ophiuchi « Herculis U Ophiuchi u Herculis Serpeutarii X Sagittarii W Sagittarii T Herculis V Sagittarii T Serpentis V Sagittarii U Sagittarii X Ophiuchi T Aquilae R Scuti K Pavonis ^ Lyrae R Lyrae 14 37 3 47 37 14 53 14 15 2 28 4 2 6 52 12 17 13 4 14 52 15 29 27 50 29 40 + 27. + 18 — 7 —19 — 5 8.9 17.1 56.4 27.8 27.6 66 42 6i 36 44 1 44 5 44 21 45 24 53 26 15 59 43 16 2 3 18 8 25 9 1 9 2 13 36 14 7 18 40 19 23 23 53 25 27 25 55 30 5 31 57 32 17 45 18 51 23 52 58 16 59 27 17 8 2 9 11 11 58 21 57 38 26 17 55 45 18 3 37 12 51 21 44 22 54 23 21 31 26 38 47 39 45 41 58 44 44 18 50 55 —65 57.5 +32 10.8 —19 51.7 + 14 50.3 + 31 53.5 —20 40.8 —15 41.5 —20 42.6 + 28 36.3 + 15 34.6 —35 +40 —15 + 26 + 18 51.6 0.7 48.1 20.1 45.9 —21 8.3 —19 45.3 —22 36.7 —22 35.0 —22 32.0 — 7 —17 —12 + 19 +42 —15 —16 +37 + 72 + 67 + 15 —12 + 35 —15 + 14 + 1 22.6 +33 15.5 —21 21.2 —27 46.2 —29 34.9 + 30 59.9 —18 55.2 + 6 12.5 —18 21.5 —19 13.3 21.3 32.3 5.5 13.6 12.2 49.2 51.1 38.1 34.4 3.5 11.4 40.0 17.4 53.7 33.5 + 2.64 2.78 3.20 3.41 3.16 5.25 2.45 3.43 2.81 2.44 3.47 3.37 3.48 2.47 2.76 3.87 2.14 3.39 2.51 2.68 3.52 3.49 3.56 3.56 3.56 3.23 3.44 3.33 2.65 1.97 3.42 3.44 + 2.12 —0.88 + 0.14 2.73 3.36 2.17 3.44 2.73 + 8 + 8 — 5 —67 +33 +43 42.3 35.7 51.4 24.4 11.8 45.5 2.27 3.53 2.93 3.51 3.53 2.87 2.88 3.21 6.23 2.21 + 1.83 —0.26 0.25 0.24 0.23 0.23 0.23 0.22 0.22 0.22 0.22 0.21 0.20 0.20 0.19 0.19 0.19 0.19 0.18 0.18 0.17 0.17 0.16 0.16 0.16 0.16 0.15 0.15 0.14 0.14 0.13 0.13 0.13 0.13 0.13 0.12 0.11 0.10 0.10 0.09 0.07 0.07 0.07 0.06 0.03 —0.01 + 0.01 0.02 0.03 0.03 0.03 0.05 0.06 0.06 0.06 0.06 +0.08 Schmidt Baxendell Schmidt , Palisa Bauschinger Gould Winnecke Borrelly Harding Hencke Peters Peters Peters Pigott Harding Gould Dun6r Pogson Birmingham At Bonn Peters J. Palisa Auwers Chacornac Chacornac Schonfeld Pogson Dundr Hencke Baxendell Pogson Pogson Dundr Pickering Geelmuyden At Bonn Hind Baxendell Pogson W. Herschel 5 Gould I ( Sawyer $ Schmidt Fabricius Schmidt Schmidt At Bonn Sawyer Baxendell Quirling Schmidt Espin Winnecke Pigott Thome Goodricke Baxendell 1867 1880 1859 1878 1887 1871 1869 1872 1828 1860 1878 1878 1878 1795 1826 1884 1878 1858 1866 1855 1876 1877 1860 1853 1854 1881 1863 1881 1860 1857 1860 18,54 1880 1881 1876 1856 1848 1880 1853 1795 <1871> ? 1881 J 1869? 1604 1866 1866 1857 1886 1860 1865 1866 1886 1860 1795 1872 1784 1856 2.7 (1) 0.0 3.0 4.1 4.9 3.4 0.5 3.7 5.9 (2) (1) 2.0 I 0.9 (0) 3.0 6.6 6.5 (3) (1) 3.2 3.2 2.0 5.6 (5) 1.0 4.5 (5) (0) (4) (1) (1) 1.4 (0) 2.0 0.6 3.7 (5) 3.3 (4) (1) (4) 5.2 9.1- 9.3 5.0 10.2 8i 6.6 7.5 8.0- 8.3 7.6- 8.7 6.1- 7.8* 11? 11? 9 5.8 5.6- 7.6* 9 7.2- 7.7 9.2-10.0* 2.0 * 8.0- 9. >11 10-11. 7.0 9.4-10. 9.1-10.5* 8.9- 9.5 9? ' 7.0 6.6- 7.8 4.7- 5.5 10 ' 8.3- 9.0* 8.0- 8.4 8.6- 9.0 6.5- 8.7 5.9- 7.5 5.5 * 9.5 7.0- 8.1 3.1 * 6.0 4.6 * >1 * 4 * 5 * 6.9- 8.5 5.8 9.1-10.5 7.6 7.0 * 6.8 8.8 * 4.7- 5.7* 4.0 3.4 * 4.0 6.1 12-13.6 6.2 <14 ? 8.0 8.9 <13 12.5? 11.9-12.5* <14 <14 <14 13.0 * 13 <11 10.3-12.0 <13 * 9.5 * <]3 * <13 14.5 <12 <13 <13 <13.5 <12 * 9.6-10.5 11.4-12.7 5.4- 6.0 <12.5 * <13 11.5-14 10.5 13 11.5-13 12.5 * 11.7 <12 * 3.9 6.7 5.4 * ? # 6 * 6.5 * 9.8-12.7 6.6 <13.5 8.8 8.3 * 9? 10.0 6.0- 9.0 5.5 4.5 * 4.7 (9) Greenwib*. Min. Mean Time Max. Period, etc. Remarks 1900.0 E.A. Decl. No. 5274 5338 5374 5430 5438 5465 5484 5494 5601 5604 5683 5593 5617 5667 5677 5682 5676 5688 5732 6770 5776 5795 6826 5830 5831 5856 5860 6887 6889 6912 5928 5931 5950 5948 5955 6044 6083 6088 6132 6181 6189 6202 6268 6368 6472 6512 6573 6624 6633 6636 6682 6726 6733 6760 6758 6794 d h in d h m d h m B Period long and irregular. Variability confirmed by Schwab Algol-type Period is Gould's. Epochs of max. and min. inferred from Cordoba obaervationa Algol-type -t-55d sin (5° E+SO") Parkhurst confirms variability My observations confirm variability, but give no times of maxima Irregular +45a sin (5» E+15°) Elements very uncertain Nova +20dsin(12''E+324») Parkhurst thinks the changes are irregular. Nova in cluster Messier 80 There is stronR evidence of marked inequality of short term, in the period Period 328d.8 will also represent Bessel's observa- tion Only one appearance known rOlder data conflict with elements derived from ob- i servations 1860 to 18S5. Hence period is perhaps L not uniform Irregular; limits of variation from Sawyer's observa- Very rude approximation to the elements Safarik has period of 387d. Possibly star has secon- dary fluctuations, and irregular period. Elements represent Lalande's and &e DM. observa- tions 5-HS5dein(7».6E+l(IO») ( Elements provisional Nova Additional observations only can distinguish which is the correct period Irregular. Period two or three months with wide fluctuations from the mean -OS.0002E2. Algol-Jype rPeriod subject to many anomalies. Very rapid < secondary oscillations near minimum remarked L by Schmidt, conflrmed by Schwab Nova rMy investigation gives merely nominal corrections i to Schoenfeld's elements, which are therefore re- l. tained +5d sin (T.2 E+ST'.e) Irregular Period three to five months, and irregular Argelander's period with provisional epochs de- termined from observations 1885-87 (■+08.4217 EJ -Os.00007 E3 i W. M. Reed's elements ^Secondary minimum about midway Schoenfeld's period with epochs found from Saw- yer's 1887 ouservations h m 14 39.0 49.7 14 55.6 15 5.0 6.4 10.8 14.1 15.6 17.0 17.3 30.4 32.2 36.2 44.4 46.1 47.0 46.0 47.9 15 55.3 16 1.7 2.7 5.9 11.1 11.7 11.7 16.0 16.7 21.2 21.4 25.4 28.0 28.5 31.7 31.3 S2.4 47.3 53.9 16 54.6 17 2.0 10.1 11.5 13.6 24.6 41.3 17 58.6 18 5.3 15.5 23.9 26.5 26.0 33.6 41.0 42.1 46.6 46.4 18 52.3 + 26 57 + 18 6 — 87 —19 38 — 5 38 —66 8 + 32 1 —20 2 + 14 40 +31 44 —20 50 —16 51 —20 52 + 28 28 + 16 26 —36 + 39 52 —15 66 + 26 12 + 18 38 —21 16 —19 52 —22 44 —22 42 —22 39 — 7 28 —17 39 —12 12 + 19 7 +42 6 —15 55 —16 57 + 37 32 + 72 29 + 66 58 + 15 6 —12 46 + 35 13 —15 58 + 14 30 + 1 19 + 33 12 — 21 24 —27 48 —29 35 + 31 —18 54 + 6 14 —18 20 —19 12 + 8 45 + 8 38 — 5 49 —67 21 +33 15 +43 49 80 Mar. 25.5 + 173.8 E + 2 7 51 22.8 E + 723 E 67 Oct. 25 9 17.5 78 May 30 71 July 12 16 88 Jan. 13 8 79 Dec. 23 82 Jan. 16 71 July 1415 + 3 9 35 E t + 3 10 51 8.6 E + 192.3 E +365.25 E +360.57 E 80 Apr. 28 Apr. 82 May 1 2.5 16.8 27 May 2.0 + 357.6 E 78 Oct. 58 Apr. 13.3 6 +359.5 E + 730 E 65 July 18.0 + 318.4 E 76 May 18 + 224.3 E 82 Apr. 79 Dec. 81 July 14.0 28.0 18 + 224.5 E + 176.7 E + 323.6 E 74 Apr. 82 Mar. 30 3.0 + 307 E +410.5 E 81 Sept. 9 70 Feb. 23 65 Mar. 4.4 79 June 12 81 July 15 58 June 5.0 56 Sept. 1 83 Nov.* 5 65 Oct. 21.7 + 361 E + 233.8 E » + 288.7 E + 180 E? + 245.9 E + 309.0 E + \kil 'e + 302.4 E * 81 May 23 56 Mar. 27 + 20 7j41.6 E— 40*'' ? 83 July 8.867 67 Dec. 22.3 86 Sept. 23.51 83 July 83 Aug. 68 Mar. 86 Sept. 67 Dec. 11.743 15.425 9.3 25.31 2.1 + 7.01185 E * + 7.59445 E + 164.75 E + 5.7690 E + 342.3 E * 83 Aug. 14.658 83 Aug. 17.624 + 6.74493 E 86 July 18 71 Nov. 29.8 87 Oct. 1 86 Aug. 71 Dec. 22 3.8 + 71.1 E + 9.097 E + 12 2146 58.3+ f + 46.0 E 87 Oct. 16 (10) No. Sch. Star 18S K.A. 5.0 Decl. Annual Variation Discoverer Date Red- ness -^' MagE Max. itude Mln. 6806 108 S Coronae austr. h, m 8 18 51 22 —37° 8'. 6 + 4.06 + 0.08 Schmidt 1866 <9.5 13.0 6811 109 R Coronae austr. 52 8 —37 8.8 4.06 0.08 Schmidt 1866 9.8-11.5 13.2 6812 T Coronae austr. 52 12 —37 9. 4.06 0.08 Schmidt 1876 <9.8 13 6849 110 R Aquilae 18 59 23 + 8 0.8 2.89 0.09 At Bonn 1856 5.5 6.4- 7.4* 10.9-11,5 6903 111 T Sagittarii 19 7 52 —17 13.2 3.46 0.10 Pogson 1863 6.5 7.6- 8.1* <11 * 6905 112 R Sagittarii 8 11 —19 33.5 3.52 0.10 Pogson 1858 3.6 7.0- 7.2* <12 * 6921 113 S Sagittarii 10 57 —19 17.1 3.51 0.10 Pogson 1860 (0) 9.7-10.4* <13 6984 U Aquilae 21 33 — 7 20.3 3.23 0.12 Sawyer 1886 (0) 6.3 7.3 7045 114 R Cygni 32 56 + 49 52.5 1.61 0.13 Pogson 1852 6.0 5.9- 8.0* <13 7101 115 llVulpeculae 41 37 + 26 57.7 2.46 0.14 Anthelm 1670 3 * ? * 7106 116 S Vulpeculae 42 27 + 26 55.7 2.46 0.15 < Hind } i Baxendell $ 11861? {18625 3.0 8.4- 8.9* 9.0- 10.0 7120 117 X Cygni 45 +32 33.0 2.31 0.15 Kirch 1686 6.3 .4.0- 6.5 13.5 7124 118 ri Aquilae 45 5 + 38.2 3.06 0.15 Pigott 1784 (2) 3.5 * 4.7 * 7149 S Sagittae 49 25 + 16 15.4 2.73 0.15 Gore 1885 (0) 5.6 6.4 7192 Z Cygni 19 57 21 + 49 38.4 1.70 0.16 Espin 1887 (7) 7? 14? 7220 119 S Cygni 20 2 28 + 57 34.2 1.26 0.17 At Bonn 1860 5.1 8.8-11.3 <13 * 7234 120 R Capricorni 3 10 —14 41.6 3.37 0.17 Hind 1848 (4) 8.8- 9.7* <13 * 7242 121 S Aquilae 4 57 + 15 11.5 2.76 0.17 Baxendell 1863 0.8 8.4-10.1 10.7-11.8* 7252 W Capricorni 5 57 —22 24.9 3.54 0.17 Peters 1872? 11? 14? 7257 122 R Sagittae 7 27 + 16 17.4 2.74 0.18 Baxendell 1859 0.8 8.5- 8.7* 9.8-10.4* 7261 123 R Delphini 7 55 + 8 39.1 2.90 ,0.18 5 Hen eke ? \ SchoenfeW J $1851> J 1859 S 4.0 7.6- 9.0 11.1-12.8 7285 124 P Cygni 12 27 +37 35.1 2.21 0.18 Jansen 1600 (2) 3- * <6 * 7299 125 U Cygni 15 7 +47 26.3 + 1.86 0.19 Knott 1871 9.3 7.0- 8.1 9.4-11.6 7194 126 R Cephei 34 37 +88 41.0 —42 0.21 Pogson 1856 0.5 5? * 10? * 7431 127 S Delphini 36 24 + 16 34.2 + 2.76 0.21 Baxendell 1860 6.0 8.4- 9.0 10.4-12.0 7428 V Cygni 36 38 +47 37.5 1.94 0.21 Birmingham 1881 8.3 6.8- 9.5 13.5 7437 X Cygni 37 44 + 35 4.0 2.35 0.21 Chandler 1886 (0) 6.4 7.2- 7.7 7444 128 T Delphini 38 38 + 15 52.5 2.78 0.21 Baxendell 1863 2.0 8.2-10.3 <13 * 7455 129 U Capricorni 40 4 —15 18.8 3.35 0.22 Pogson 1858 10.2-10.8* <13 * 7456 RR Cygni 41 3 +44 20.4 2.08 0.22 Espin 1888 (6) 8? 9.5? 7459 130 T Cygni 41 24 +33 50.6 2.39 0.22 Schmidt 1864 (1) 5.5? * 6? * 7468 131 T Aquarii 42 17 — 5 40.9 3.17 0.22 Goldschmidt 1861 1.2 6.7- 7.8 12.4-13.0 7483 T Vulpeculae 45 19 + 27 42.3 2.54 0.22 Sawyer 1885 (0) 5.5 6.5 7488 Y Cygni 46 16 + 34 7.0 2.39 0.22 Chandler 1886 (0) 7.1 7.9 7560 132 R Vulpeculae 57 56 + 23 14.9 2.66 0.23 At Bonn 1858 2.0 7.5-8.5 * 12.5-13.6 7571 V Capricorni 20 59 9 —24 30.2 3.50 0.24 Peters 1867 9.5? 14? 7577 X Capricorni 21 15 —21 55.8 3.45 0.24 Peters 1872? 11.5? <14 7609 T Cephei 7 33 + 67 54.4 0.82 0.24 Ceraski 1878 6.3 5.6- 6.8 9.5- 9.9 7659 133 T Capricorni 14 —15 46.4 3 32 0.25 Hind 1854 (2) 8.9- 9.7* <13 * 7754 W Cygni 30 34 +44 43.7 2.27 0.27 Gore 1885 (5) 6.1- 6.3 6.7 7787 Cygni 36 1 +42 11.0 + 2.36 0.27 Schmidt 1876 (3) 3 13.5 7779 134 S Cephei 36 57 + 77 58.2 —0.60 0.27 Hencke 1858 9.1 7.4- 8.5* 11.5 * 7803 135 /i Cephei 39 4 + 58 7.0 + 1.83 0.27 J Hind > I Argelander S 1848 6.2 4? * 5? * 7907 U Aquarii 21 55 24 —17 19.5 3.29 0.29 Peters 1881 10? 14? 7944 136 T Pegasi 22 1 49 + 11 49.9 2.93 0.29 Hind 1863 (3) 8.5- 9.3 <13 7994 R Piscis austr. 9 45 —30 19.6 3.43 0.30 Gould 1884 5.7? <11? 8073 137 5 Cephei 23 48 + 57 40.4 2.21 0.31 Goodricke 1784 (2) 3.7 * 4.9 * 8093 R Indi 25 36 —68 2.1 4.40 0.31 Gould 1884 9? 11? 8153 R Lacertae 36 50 + 41 36.8 2.65 0.31 Deichmuller 1883 1.8 8.6- 9.3 <13.5 8230 138 S Aquarii 49 20 -21 7.0 3.23 0.32 Argelander 1853 4.0 7.7- 9.1* <12.5 8273 139 (3 Pegasi 56 45 +27 17.8 2.90 0.32 Schmidt 1847 (2) 2.2 * 2.7 * 8290 140 R Pegasi 22 59 22 + 9 45.7 3.01 0.32 Hind 1848 (4) 6.9- 7.9 <13 8373 141 S Pegasi 23 13 13 + 8 7.6 3.03 0.33 Marth 1864? 1.7 7.3- 8.0 <13 8512 142 R Aquarii 36 19 —16 5.3 3.11 0.33 Harding 1811 4.3 5.8- 8.5* 11? * 8588 R Phoenicis 48 55 50 35.6 3.14 0.33 Gould 1884 8^-? 11? 8597 V Ceti 50 29 — 9 46.1 3.08 0.33 Peters 1879 9.7? 14? 8600 143 R Cassiopeae 23 51 4 +50 34.9 + 3.01 + 0.33 Pogson 1853 6.5 4.8- 7.0 9.8- 12 ^(11) Greenwich Mean Time Min. Max. 56 Mar. 23 86 Sept. 17.5 85 Apr. 7.5 88 Jan. 4 3 32 85 Dec. 1 9 36 70 Jan. 29.2 73 May 1.03 56 Aug. 7 83 July 7 69 June 28 69 Nov. 20 86 Sept. 20.0 81 Aug. 7 Period, etc. 6 30.5 +352.3 E + 384 E + 270 E + 230 E + 7.033 E + 425.7 E -0.4 E^ 85 Apr. 27.8 1763 May 26.76 88 Jan. 6 12 32 85 Dec. 4 9 36 + 67.80 E + 406.045 E + 7 4 14 0.0 E +89 11.0 E 65 July 9.2 64 Sept. 3 85 Sept. 77 Feb. 21.5 73 May 10 86 Oct. 7 23 56 69 July 13.6 77 Oct. 9.6 81 Feb. 15.5 85 Nov. 1 19 8.6 88 July 15 19 8 65 July 19.0 73 Feb. 6 84 Oct. 12 73 Aug. 22 81 June 1 86 Oct. 13 14 20 84 Sept. 10.0 72 Sept. 19 81 May 10.5 85 Nov. 2 20 35.0 65 Sept. 20.0 86 Sept. 85 Sept. 73 Aug. 23 66 Nov. 13.2 84 Dec. 13 + 461.3 E + 277.0 E +423 E? + 15 14 24 E + 331.9 E + 203.5 E 80 Sept. 16 88 Jan. 15 57.0 81 May 16 69 Nov. 14 88 Jan. 2 6 32.5 83 Dec. 14 67 Aug. 11 50 Dec. 6 77 Dec. 19 11 Nov. 30.6 + 203.3 E + 4 10 29.0 E + 1 11 56 48 + 136.9 E+ + 310 E? + 210 E? + 383.2 E + 269.4 E + 126 E +484 E + 432? + 373 E + 315 E + 279.3 E Remarks. Schmidt formerly thought period is six days ; but his observations since 1881 throw doubt on periodicity In west end of a small nebula 4s foil. B Coronae austr. Elements provisional, but rapid shortening of period pretty certain 1900.0 R.A. Decl. + 323.3 E— 0.067 E^ + 347 E + 146.71 E +425 E? + 70.43 E + 284.0 E 54 Feb. 10 ? 86 Sept. 64 July 9.5 + 273 E? + 429.0 E+ EiemcDts of J. Baxendell, Jr. J +0(1.00574 E2 +0(3.0000178 E3 t Elements provisional. Elements adopted are a correction of +lh 43m of Argelander s epoch 400, and of — 48 of his period 18 54.4 55.2 55.3 19 1.5 10.5 10.8 13.6 24.0 34.1 43.5 44.3 46 47.4 51.4 19 58.6 —37 5 ■37 5 •37 6 + 85 ■17 9 20 Elements ftom Parkhurst's observations ; very un- certain fType of Beta Lyrae. Secondary minimum follows \ principal one 34d.y. Evidence of systematic but L email deviations from uniform period Elements are Baxendell's fSclioenfeld thinks period somewhat less than a < year ; Schmidt b obsns. confirm ; variations gener- L ally between 8.0 and 8.5. Evidence of periodic iuequali^ A secondary maximum follows principal one, two or three months Bright and faint minima, but not regularly alternat- ing Large deviations firom a mean period Period about one year, but variations in some years scarcely noticeable Algol-type. Large anomalies in period f^d Bin (4° E+9(P) < Schoenfeld had a term —0.06 E2, but later observa- L tions do not confirm it Elements from Parkhursf a observations, but uncer- tain 3.4 5.7 7.0 8.6 9.5 10.5 14.1 16.5 58.9 38.5 —19 29 —19 13 — 7 15 + 49 58 + 27 4 + 27 2 + 32 40 + 45 + 16 22 + 49 46 + 57 42 —14 34 + 15 19 —22 17 + 16 25 No. 6806 6811 6812 6849 6903 6905 6921 6984 7045 7101 7106 7120 7124 7149 7192 7220 7234 7242 7252 7257 38, 39, + 5 8 47 39.974 f + 378.1 E +0M7E^ + 317.5 E + 387.16 E+ Argelander's period from his observations 1848-64; out those of Schmidt since 1866 do not confirm it Parkhurst's observations confirm variability, but give no maximum There is apparently a large periodical ineguaUty ol short term Argelander's elements Elements very uncertain Period of one or two months, but the star's light is often nearly constant for many months 36d sin (10« E+235») Elements from Parkhurst's observations, and uncer- tain 23d Bin(16»E+346») 40.7 42.6 42.6 43.2 44.7 47.2 48.0 159.9 1.8 2. 8.2 16.6 32.3 37.8 36.5 40.4 21 67.9 22 4.0 12.3 25.4 28.9 38.8 61.7 22 58.9 23 1.6 15.6 38.6 51.3 52.8 2353.3 + 8 47 + 37 43 +47 35 + 88 50 + 16 44 +47 47 +35 13 + 16 2 —15 9 +44 30 +34 7459 7261 7285 7299 7194 7431 7428 7437 7444 7456 7456 — 5 31 + 27 62 + 34 17 + 23 26 —24 19 —21 45 + 68 5 —15 35 +44 56 + 42 23 + 78 10 + 58 19 —17 16 + 12 3 —30 6 7994 7468 7483 7488 7560 7571 7577 7609 7659 7764 7787 7779 7803 7907 7944 + 57 64 —67 48 +41 61 —20 53 + 27 32 + 10 + 8 22 —15 50 —50 21 — 9 31 +50 50 8073 8093 8153 8230 8273 8290 8373 8512 8588 8597 8600 (12) {Continued from page 3.y one-tenth of the right-ascension, eaypressed in time-seconds, for the equinox 1900.0. The precept need not be rigorously applied where two or more variables occur within a few seconds of right-ascension, as it would be better to deviate from the strict order by one or two units than to disturb numbers al- ready affixed. The numbers of this catalogue have been taken in accord- ance with these principles ; and it is respectfully submitted to the judgement of astronomers whether the system deserves general adoption. The selection of the stars to be included in the catalogue has been a delicate task, whose difficulty can only be appre- ciated by those who are familiar with the confusion which so easily creeps into this branch of astronomy, and who have had occasion to undertake the discouraging and thankless labor of bringing order out of the chaos, by the careful and continuous observation necessary to discriminate the actual cases of variability from the numerous pseudo-variables with which the periodicals of the day are filled. Considering it extremely desirable that no star should be placed in the list, no matter how high the authority on which its variability is asserted, without independent verification, I have had under observation a large number of stars during the last few years with this especial object in view. Mr. Sawyek, also, has similarly followed an extensive list, gen- erally of the brighter class ; and I have had the inestimable advantage of access to his results, and of consultation with him as to the propriety of the insertion of many of these stars. Another class of variables, mainly those discovered by Dr. Peters, which I found considerable difficulty in keeping track of with insufficient optical means, has been assiduously and effectively observed by Mr. H. M. Pakk- HUEST, and his series of observations has been the main reliance for the attestation of the variability of these faint stars. Without the cordial collaboration of these gentlemen the present work would have been much less complete. Two remarks remain as to the selection of the stars. First, all stars of Schonfeld's catalogue have been retained, although there appears to be perhaps a slight ground for doubt as to one or two of them. Thus, for instance, I have never been able to detect any trace of fluctuation in 8 Orionis, and I believe Sawtee has a similar experience. But its re- jection cannot be justified on this ground alone, in the face of high authority in favor of the variability. Secondly, as to the additions, I have had in mind as a paramount object that our knowledge must be kept clear of confusion, even at the risk of an incomplete statement of it ; and that the omission of a star actually variable is not as injurious an imperfection in the catalogue as the insertion of one which is not so. Therefore, where a reasonable doubt has ap- peared to exist as to any star, it has been excluded until it could be further examined. A list of some of these cases is given below, with a succinct statement of the reasons for their omission. NOTES RELATING TO STARS NOT INSERTED IN THE CATALOGUE. Positions for Equinox 1855.0. Ih igm 31S _4° 40'.9 Gould thinks certainly variable. Sawyer's observations show no trace of fluctuation ; his numerous estimates, ranging over a long period, all lie between 6.5 and 6.8. 1''27""1P -Ml° 48'.6 In Boreelly's list. Bull. Astron. II. Gore thought near maximum 1885 Nov. 30, but observed only slight variability in 1886. Sawyee thinks it is not variable. Ih 33"! o» —7° 21'. 6 Safarik thinks variable from 8.4 to 9.2, from his obser- vations 1887 Oct. to 1888 Feb. 19 ; period probably longer than four months. 3h4im9s +35° i6'.7 Kam suspects variability ; see A.N. CX, 181. By my ob- servations 1888 April 2, and Aug. 11, it must have been below 11.5 or 12.0. 3" 45" 26' +7°20'.6 Gould thought certainly variable, from 6.8 to 8.0. My observations seem to favor fluctuation, but I desire to con- tinue them before pronouncing definitely. 4h ^gm 48= _i6° 39'.3 Gould's li Eridani. Savtyer's observations do not show any change of light. 4" 53™ 11" —12° 45'.1 Gould's S Eridani. Sawyer's observations do not show any change of light. oh 21- 48» —4° 49'.1 Safarik thinks variable by several magnitudes. Near S Orionis. See V.J.S. 1884, p. 145. 5h 22"> 22= —1° 11'.7 Gould says it appears to be variable from 4f to 6. The star is very red. Gore thinks his observations confirm variability. 5" 27"' 10" +10° 8'. 1 Gould thinks variable, from discordance of Cordoba esti- mates, 5.7 to 6.7. Other observations do not appear to confirm. gh 12"' 54= +47° 43'. 5 EspiN suggests variability. Not yet confirmed. (13) 7h 2in. 3B _iio i5'.9 EspiN asserts variability and assigns a period of fourteen days ; in which he is confirmed by Jackson. But Sawyer, Yendell and myself have carefully followed it without de- tecting the slightest change. T consider the constancy of its light practically demonstrated. 71- 35m 15s _3i° 19/.6 Gould's i2 Puppis. Neither Sawyer's observations nor mine show any unsteadiness of lustre. 7" 43m IP _40M7'.5 GtOuld's T Puppis. Sawyer has followed the star as closely as the low altitude of the star in this latitude will permit, and has yet found no confirmation. 8him34B +19°50'.0 Peters announced as variable, A.N. CII, 147. My ob- servations do not confirm, but are indecisive. Parkhurst thinks that, if variable, it may possibly be of Algol-type, but the evidence of change by his observations is also slight. 10" 0" 42= —51° 29'.0 Goitld's B Velorum. As he gives no period, and there are no other confirmatory observations, I have considered it safer not to insert it in the catalogue . 10* 49-° 30= _59°44'.8 Gould's T Carinae. Upton's comparisons in 1883 seem to confirm, but the observed limits of variation are so small that I think more evidence is essential before classing it with the known variables. 12" 26"" 47= —22° 35'.7 |3 Corvi. Sawyer's observations seem to show clearly the variation of this star, but he agrees with me that it is better to await confirmation before inserting in the catalogue. See A.N. CXI, 271. 13" 26" 58= —12° 28'.0 Schmidt thought variable, and Gould that the Cordoba estimates confirmed it, and the latter suggested the name Y Yirginis. Sawyer, however, has eight observations, in different years, all within the narrow range 6.0 to 6.25 ; and he is very skeptical as to its variability. The star is very difficult to observe, which may account for the discordances. See my note H.C.O. Annals, XIV, Part II, p. 456, star No. 2293. 14" 56"" 20= —68° 9.4 Gould's T Triang. austr. He says it is variable between 7.0 and 7.4, in a period which differs but little from a mean solar day. The assigned limits are so narrow that con- firmation by other observations is desirable, to justify its insertion in the catalogue. 15" 35"" 17= — 10°27'.7 Weiss says it is variable from 7.0 to 8.8, in a period of about four months. My observations yet do not enable me to confirm the variation certainly. 15" 37"" 55= —20° 40'.8 Peters announced the variability, A.N. CII, 147. My observations furnish no decisive evidence in the matter. 16" 20" 47= —19° 11'.5 Peters announced the variability, A.N. XCIX, 120. My observations indecisive. Parkhurst says he has never been able to see this star, and he mentions it, in a private letter, as one of the three stars of Peters which he has not yet been able to confirm. 18"1'"54' +28°44'.4 oHerculis. See my note, H.C.O. Annals, XIV, Part II, p. 464, No. 3048. 19h 9m 53» _19° 19'.4 Safarik thinks his observations show variability between 9.4 and 10.1. Near S Sagittarii, with which he confounded it, when first undertaking to observe the latter. 19" 15" 13= +17°23'.l Espin's suggestion of variability is very likely correct, al- though my observations do not yet confirm it certainly. 19" 26" 15= +17° 26'.0 I have given the evidence which, it seems to me, render the variability almost certain, in the Science Observer, Nos. 43-44, Vol. IV. It lies 0=.7 foil., north 2'.2, DM. +17.3997. I have looked for it at least fifty times unsuccessfully, when it must have been below 13. 19" 27" 13= —25° 2'.0 Gould thinks variable between limits wider than 5.3 to 6.7. Sawyer has three observations in 1882, 1886 and 1887, giving accordantly 5.9 or 6.0. 19" 55" 18= +30° 25'.6 EspiN suggests variability. Not yet confirmed. 20" 5" 3= +47° 25'.4 EspiN alleges variability, 7.7 to 8.9. My estimates so far perfectly accordant, 8.9 or 9.1. 20" 8" 7= +38° 17'.4 EspiN alleges variability, 6.6 to 8.0. My observations indicate that there is some possibility of change, but the star is close to another, and difficult to adjudge properly. 20" 8" 37= —21° 45'.6 Safarik thinks his observations show fluctuation of six- tenths of a magnitude. Secchi had previously marked it " var. ? " in his Prodromo. 20" 23" 34= +39° 29'.9 EspiN alleged variability, 7.9 to 9.2 ; afterwards, in 1886, found it practically invariable. 20" 38" 50= +17°34'.0 D'Arrest suspected variability, and my observations in 1886 and 1888, lead me to believe it may possibly be sub- ject to it. Gore asserts a period of perhaps 111 days. (14) 21" 1" 37» +47° 3'.9 EspiN alleges as variable from 4.7 to 6.0, in long or irreg- ular period ; but my observations, some of them nearly coincident in date with his, contradict them and give no sup- port to the idea of fluctuation. Sawyer also thinks the star is constant. The star is very red, and diflScult to ob- serve ; one of those likely to deceive an inexpert or uncriti- cal observer. 22" 28'" 17' —8° 20'. 8 HnjD suspected the variability, and Schonpeld was in- clined to think it not improbable. See A.N. LXIV, 176. Also Nature., XXX, 346. I am observing the star, but can- not yet say anything definite with regard to it. 23" 39" 0= +2° 40'.8 Gould was inclined to suspect variability, and other evi- dence seems to accord with the idea. See my note H. 0. 0. Annals, XIV, Part II, p. 474, No. 4198. My observations in 1885 and 1886 do not confirm, and I am strongly of opinion that the red color is responsible for much, if not all, of the observed contradiction in the estimates, made under different circumstances. 23" 53"" 54' -1-59° 33'. 1 Secchi marked this as " var. ?" My own observations in 1875 led me independently to suspect it, at first, but I after- wards concluded that the trouble lay entirely in the difficulty of estimating properly this very red star so close to a bluish companion. In assigning Argklandbr's letters the rubrics of Schonfeld and WiNNECKE have been observed. In Virgo and Cygnus the al- phabet is exhausted, and the extension of the notation under the suggestion of Hartwig, favored by Schonfbld, is begun by des- ignating No. 5037 of the catalogue as RB Virginis, and No. 7456 as BB Cygni. SECOND CATALOGUE OF- VARIABLE STAES. S. C. CHANDLER. FROM THE ASTRONOMICAL JOURNAL. JNo. 300. SECOND CATALOGUE OF VARIABLE STARS, By S. C. chandler. The unexpected delay in the appearance of this Catalogue has largelj' been due to the labor involved in carrying out the design of making the elements of every star definitive, in the sense that every observation available up to date should be included in the calculation. This design has been adhered to as faithfully as possible, and the elements here given may be regarded as a practically complete representa- tion of our present knowledge. Even in the few cases, especially mentioned in the notes, where observations of maxima and minima have come to hand since the computa- tion of the elements, they have been compared with the lat- ter, in order to assure that the deviations are merely nominal. While the general form of the First Catalogue has been retained, some changes have been made to increase its con- venience in use, and to supply additional information of value to observers. The nature of these changes will be apparent in the following description of the construction. Number. The number in the first column of both right and left-hand pages is assigned upon the system of ordinal notation introduced in the First Catalogue, by taking one- tenth of the right-ascension, expressed in time-seconds, for the equinox 1900.0. This precept has not been rigorously applied, nor in the future need be so applied, where two or more variables occur within a few seconds of right-ascension. Also, in the numbers for the newer stars, it has been thought best to violate the strict rule in a few cases, where the num- bering would otherwise have been consecutive, in order to provide gaps for future variables. It is essential that num- bers once assigned should not be disturbed, even at the expense of deviating by one or two units from the strict enumeration. Star. The letters according to Argelandke's system of nomenclature, extended by the use of double letters, require no special remark. B.A. and Decl. for 1900.0. These are given to the near- est second and tenth of a minute, respectively. To secure 8,trict accuracy in the last place, all the available meridian and micrometric determinations of position have been col- lected and reduced accurately to 1875.0, with precessions and secular variations calculated for this epoch. Any ap- preciable proper motions were then detected and assigned ; and the mean places carried forward accurately to the equinox and epoch of 1900.0. For some of the newly discovered variables no precise places could be found, and for these it was necessary to employ the rude data given by the observ- ers — often expi'essed merely to the tenth of -a minute in R.A. and round minute in Declination. It is desirable to suggest that the use of such coarse units is insufiicient for the purpose of certainly distinguishing these objects, in their fainter stages, from the small telescopic stars in their vicinity ; and that those who are addicted to this habit should raise their standard of precision. Annual Variations for 19,00. Precessions plus proper motions for this date, to the nearest hundredth in seconds and minutes, respectively, in R.A. and Declination. B.A. and Decl. for 1855.0. These are repeated from the First Catalogue, as a matter of general obvious convenience. Bedness. This is expressed in a numerical arbitrary scale, which may be approximately defined as follows : corres- ponds to white ; 1, to the slightest perceptible admixture of yellow with the white ; 2, to yellow ; 3, to yellowish orange ; 4, to full .orange or orange-red ; 5-10, to increasing shades of intensity up to the deepest red of which we have cogniz- ance in the heavens, exemplified nearly by such stars as 1771 BLeporis, 7i28 VGygni, 1179 S Cephei aod 7803 /iCephei. For a fuller description, with details of the determinations, reference is made to A.J. VIII, 137, and to the introduction to the First Catalogue. Mr. Yendell has furnished some estimates of stars not included in my determinations, con- forming to the same scale ; and these are indicated by. an asterisk. Where a round unit merely is given, it signifies that it is not the result of direct estimate, made uniformly with the general series, but merely a rude attempt to assign a value from general knowledge, or description by other observers. Maximum and Minimum Magnitude. These columns con- tain the previously observed extremes of brightness at each of these phases, derived from a comparative scrutiny of all the trustworthy data up to date, expressed in the prevailing scale of magnitude, namely, that of the Uranometria Nova, (2) the Durchmusterung, the Uranometria Argentina and tbe Southern Durchmusterung. For the fainter magnitudes, where our knowledge of absolute standards for the extension of Argelander's scale downwards is vague, the scale used may be defined by the limits of visibility established by ScHONFELD for the Mannheim refactor, 12.7 ; by my 64-inch, 13.0 ; and by Townlet for the Madison 15-incb, 14.7. M — m. The interval in days and fractions thereof, from minimum to the next following maximum. In the First Catalogue this information was given by the calendar date. The present mode is chosen for economy of space, and is quite as convenient in computing times of minimum from the elements of maximum. Elements of Maximum. These are uniformly in Green- wich mean time. The principal epoch is expressed in two ways ; first, by the ordinary calendar date, without fractions of a day ; next by the corresponding Julian date, with the fractions. For the 10 stars of the ^Zg^oZ-type, and for 221.3 ■^ Geminorum and 3186 T Cancri, the nature of the light- curves permits the minimum alone to be determined, and therefore the column contains for these stars, as well as for § Lyrae, the principal minimum-epoch. The period is expressed in days and decimal fractions, except for some of the stars of short period, where hours, minutes and seconds are used, following custom, and con- venience in writing the small inequalities which it would be awkward to express in decimals of a day. The factor E is the number of periods elapsed since the principal epoch. The principal epoch is generally the first recorded maximum (or minimum) after discovery, in con- formity with the practice of Argelander and SchOnfeld. Wherever this rule is departed from, it is for the purpose of adhering to the enumeration already established in stand- ard investigations of particular stars. Exceptional devia- tions from these rules ar^ recorded in the notes. Following the periods are tbe numerical inequalities de- pending on powers or periodic functions of E. In addition to the cases where these inequalities have been numerically determined, there are a large number of others where the existence of such terms has been discovered, but in which it is not yet pra(3ticable to determine the coeflacients. These are indicated in tbe column of remarks by the words " periodic inequality," a query being affixed when the evidence is some- what obscure. Tbe^column of remarks also contains, for the non-periodic stars, a characterization of the type of variability. For want of a better concise phrase, the term " Irregularly periodic " is used for stars in which the periodicity is mani- fested in a slight degree. The term " Irregular " is used where there is an entire absence of any discernible law in the changes of brightness. It is hardly necessary to say that the elements are the re- sult of original investigation in all cases except where the authority is accredited in tbe remarks. Basis of Elements. These columns contain the number of maxima, M, tbe number of minima, m, and the interval embraced by them, upon which tbe calculation of tbe ele- ments depends. This information is of the utmost impor- tance and usefulness to future observers of these objects, indicating the character of our present information, and guiding the selection of stars for observation. It should be noted that a very large proportion of the maxima and minima were determined by two or more observers, so that the actual number of observations of the phases used in the calculations is much larger than appears. For convenience in computing ephemerides, and in com- paring future observations with the elements of the Cata- logue, a table is added for the conversions of Julian and ■Calendar dates during the next ten years. Table for Converting Julian AND Calendar Dates >. 1893 1894 1895 1-896 1897 1898 1899 1900 1901 1902 1903 Jan. 1 241 2465 2830 3195 3560 3926 4291 4656 5021 5386 5751 6116 Feb. 1 2496 2861 3226 3591 3957 4322 4687 5052 5417 5782 6147 Mar. 1 2524 2889 3254 3620 3985 4350 4715 5080 5445 5810 6175 Apr. 1 2555 2920 3285 3651 4016 4381 4746 5111 5476 5841 6206 May 1 2585 2950 3315 3681 4046 4411 4776 5141 5506 5871 6236 June 1 2616 2981 3346 3712 4077 4442 4807 5172 5537 5902 6267 July 1 2646 3011 3376 •3742 4107 4472 4837 5202 5567 5932 6297 Aug. 1 2677 3042 3407 3773 4138 4503 4868 5233 5598 5963 6328 Sept. 1 2708 3073 3438 3804 4169 4534 4899 5264 5629 5994 6359 Oct. 1 2738 3103 3468 3834 4199 4564 4929 5294 5659 6024 6389 Nov. 1 276S, 3134 3499 3865 4230 4595 4960 5325 5,690 6055 6420 Dec. 1 241 2799 3164 3529 3895 4260 4625 4990 5355 5720 6085 6450 In view of the profuse announcements of variability dur- ing the past few years, the very moderate increase in tha present Catalogue over tbe previous one may excite surprise among those who do not know the facility with which . rub- bish collects about the subject. This Catalogue would be very much longer if all such announcements, made on what might be regarded as reputable authority, had been admitted. But it wOuld have ceased thereby to represent (3) any exact knowledge. Among those who busy themselves with the subject there are some with whom the uncritical habits of the seventeenth century still prevail, and who emulate the exuberant enthusiasm of Montanari, who dis- covered more than a hundred new variables — only one of which is now iu our lists — and who made no observations of any service whatever, as to the phenomena; rather than the critical and conscientious care of Argelander, who first winnowed the chafif from the wheat, iu his little cata- logue of 18 stars published in 1844, and from that point elevated the subject into a science ; or of Sch6nfeld, who extended it and maintained its purity. No apology therefore is needed for the unrelaxed applica- tion of the principles, for deciding the delicate and perplex- ing question as to what stars shall be admitted, which were set forth in the introduction to the First Catalogue. They may be summed up iu two sentences. It is a paramount , consideration that our knowledge must be kept clear of con- ', fusion, even at the risk of an incomplete statement of it. No star should be inserted, no matter how high the authority \ on which its variability is declared, without independent verification on undoubted authority and evidence. Other- wise the result will be chaos. As a matter of fact then, the only stars added are those which have been suflSciently confirmed since the first edition. On the other hand, four stars which have long appeared in the older lists have been dropped, for reasons which will be ; stated in the notes to the supplementary list, to which they j have been relegated ; and there are perhaps two or three others which mi^ht be treated in the same way. During the \ past two years other investigations have prevented my giv- I ing the attention which I had previously given, to the obser- vation of the long list of objects awaiting confirmation ; but Mr. Yendell has taken the matter into efficient charge, and has kept more than a hundred of them on his working list. It is to his discrimination and zeal that many of the con- firmations are due, as will be seen in the notes to the cata- logue. He has kindly kept me supplied with the evidence on this matter afforded by his observations. I am also deeply indebted to Mr. Parkhdkst and Mr. Yendell for the results of their very numerous observations, in advance of publication, of maxima and minima of known variables. 'During the last few months I have been in continual corres- pondence with these gentlemen, and to them is almost entire- ly due the completeness with which the present work has been brought up to date. Without their cordial collabora- tion and interest, indeed, it would have been extremely imperfect. Profound acknowledgements are also gratefully made to Messrs. Townlet, Egberts and Sawyer, for manu- script copies of observations, and other information of the greatest value. The work of accurate observation of the phenomena of the known variables, in which these astronomers have been so assiduous — and which, as in the case of the comets, is of a much higher grade than thediscDveiy ofTiew objects -^ is the most essential element to the progress of this branch of astronomy, and is a field which affords ample room for many more participants. This seems as appropriate a place as any for an important remark. In comparing future observations of maxims^ and minima with the elements of the catalogue, it should be borne in mind that the periods here given are their mean values, determined generally from long series of observa- tions, and that any deviations, apparently larger than the accidental error of observation, are probably due to some systematic inequality in the course of development. It will be seen from an inspection of the Catalogue that, beside the forty cases among the variables of long periods for which I have determined such terms numerically, there are about thirty others where their existence is distinctly indicated. Indeed, as I have elsewhere stated, there is scarcely a case, where the observations are sufficiently continuous to give evidence on the point, in which they are not manifest ; and we may safely conclude that they are generally prevalent, and inseparably associated with this type of variability. They are in general periodic, running through cycles of fifty or sixty periods on the average, sometimes of only twenty or thirty periods. The amplitude is sometimes con- siderable, rising to, say, a fifth of the star's period. For the most part, however, they are comprised wjthin the limits of twenty or thirty days from the time of the phase indicated by the mean period. In the preparation of ephemerides for the use of observers, in preparing to observe the phases, it therefore does not seem advisable to. apply arbitrary cor- rections, dependent on one or two recently observed maxima, as is sometimes done : on account of the risk of thereby in-, flnencing prejudicially the intending observer's results, which ought to be free of all bias. It seems better that his work should be done under the influence only of the general warn- ing that such real variations from the predicted times are continually in operation, by the very nature of the phenom- ena. There is no class of work in which freedom from pre- occupation of mind is so essential as in this. This is so especially true of the stars of the .^Zg^oZ-type that the publi- cation of ephemerides of their minima nearer than to the nearest hour, is to be deprecated. The above remarks of course do not apply to stars which have been recently discovered, or which have been rather in- frequently observed. The uncertainty in the elements given for these will be apparent by inspection of the columU " Basis of Elements," or is especially remarked in the note^ at the end of the Catalogue. Special effort has been made to supply as many epochs of minimum in the present Catalogue as the data available per- mitted ; this being the particular in which our knowledge is most defective. From column M — m it will be seen that this element is given in 115 cases, as against only 63 in the First Catalogue. (4) No. 1900.0 1900 185 5.0 Red- Magnitude Star R.A. Decl. Annual Variation R.A. Decl. ness Max. Min. 100 TCeti h in 8 16 42 —20 36.7 + 3'.04 + 0.33 ll 111 B 14 26 — 20°5l'.8 4 5.1- 5.3 6.4- 7.0 107 T Cassiopeae 17 49 + 55 14.3 8.22 0.33 15 25 + 54 59.3 7.3 7.0- 8.0 11.0-11.2 112 RAndromedae 18 45 + 38 1.4 3.16 0.33 16 25 +37 46.4 5.0 5.6- 8.6 <12.8 114 S Ceti 18 58 — 9 53.0 3.05 0.33 16 41 —10 7.9 2.0 7.0- 8.0 12 116 B Cassiopeae 19 15 + 63 35.5 3.30 0.33 16 47 + 63 20.6 _ >1 ? 161 T Piscium 26 49 + 14 2.9 3.11 0.33 24 29 + 13 48.0 9.5-10.2 10.5-11.0 209 « Cassiopeae 34 50 + 55 59.3 3.38 0.33 32 18 + 55 44.5 5 2.2 ' 2.8 224 S Andromedae 37 15 +40 43.2 3.26 0.33 34 49 + 40 28.3 5 7 0? 243 U Cassiopeae 40 46 + 47 42.6 3<33 0.33 38 16 +47 27.8 6 8.0- 8.8 <15 320 UCepliei 53 23 + 81 20.2 5.09 0.33 49 38 + 81 5.5 7.1 9.2 432 S Cassiopeae 1 12 18 + 72 5.1 4.35 0.32 1 9 4 + 71 50.8 6.7 6.7- 8.6 <13.5 434 S Piscium 12 21 + 8 24.3 3.13 0.32 10 + 8 9.9 1.0 8.2- 9.3 <14.7 466 U Piscium 17 41 + 12 20.7 3.17 0.32 15 18 + 12 6.4 — 9.5 14.5-15.0 494 RSculptoris 22 22 —33 3.5 2.77 0.31 20 17 —33 17.8 9 5.7 7.6- 8.0 513 R Piscium 25 29 + 2 21.9 3.09 ♦0.31 23 10 + 2 7.9 2.0 7 - 8.8 <13 678 U Peisei 52 56 + 54 20.1 3.95 0.29 50 + 54 7.0 6.4* 8.2 <11 715 S Ai-ietis 1 59 16 + 12 2.8 3.21 0.29 1 56 51 + 11 49.7 2 9.1- 9.8 14? 782 R Arietis 2 10 25 + 24 35.5 3.40 0.28 2 7 :Vd + 24 22. H 1.8 7.6- 9.0 11.7-13.0 793 TPersei 12 12 + 58 29.5 4.26 0.28 9 + 58 16.7 4 8.2 9.3 806 Ceti 14 18 — 3 25.7 3.03 0.27 12 1 — 3 38.3 5.9 1.7- 5.0 8 - 9.5 814 S Peisei 15 41 + 58 7.8 4.27 0.28 12 29 + 57 55.2 5.0 8.5 13 845 RCeti 20 55 — 37.8 3.06 0.27 18 38 — 50.1 2.4 7.5- 8.8 13.5 893 UCeti 28 56 —13 35.2 2.88 0.27 26 45 —13 47.2 3 6.8- 7.3 10. 5< 906 R Trianguli 30 59 + 33 49.8 3.62 0.26 28 16 + 33 37.8 5.4* 5.8 11.7 976 T Arietis 42 45 + 17 5.5 3.34 0.25 40 15 + 16 54.1 3.2 7.9- 8.6 9. .3- 9.7 1072 p Persei 2 58 46 + 38 27.2 3.83 0.24 55 54 + 38 16.5 •> 3.4 4.2 1090 jS Persei 3 1 40 + 40 34.2 3.89 0.23 2 58 45 +40 23.6 2.3 3.5 1113 U Arietis 5 30 + 14 24 3.32 0.23 3 3 1 + 14 14.0 - 7.8 <11 1222 R Persei 23 41 +35 19.6 3.81 0.21 20 50 + 35 10.1 2.3 7.7- 9.2 12.8-13.5 1367 XTauri , 47 50 + 7 28.8 3.22 0.18 45 26 + 7 20.6 , 6.6 8.1 1411 }. Tauri 3 55 8 + 12 12.5 3.32 0.17 3 52 39 + 12 4.6 3.4 4.2 1537 T Tauri 4 16 10 + 19 17.8 3.49 0.15 4 13 33 + 19 11.3 9.2-11.5 12.8-<13.6 1574 W Tauri 22 16 + 15 53 3.42 0.14 19 43 + 15 46.5 5 9? <12.5 1577 R Tauri 22 49 + 9 56.4 3.29 0.14 20 21 + 9 50.1 4.5 7.4- 9.0 12.8-13.5 1582 S Tauri 23 43 + 9 43.5 3.28 0.14 21 16 + 9 37.3 2.5 9.5-10.0 <13.5 1623 T Camelopardalis 30 26 + 65 59 5.85 0.13 26 4 + 65 53 6* 7.9- 8.2 <12 1635 RReticuli 32 30 —63 14.2 0.61 0.12 32 3 —63 19.8 7 <13 1654 R Doradus 35 36 —62 16.4 0.70 0.12 35 5 —62 21.8 7 5.7 6.7 1717 V Tauri 46 15 + 17 22.1 3.47 0.11 43 39 + 17 17.4 3.3 8.3- 9.0 <13.5 1761 R Ononis 53 35 + 7 58.7 3.25 0.10 51 8 + 7 54.3 4.9 8.7- 9.1 11.2-13.5 1768 £ Aurigae 54 47 + 43 40.5 4.30 0.09 51 34 + 43 36.2 1 3.0 4.5 1771 R Leporis 4 55 3 —14 57.4 2.73 0.09 4 53 —15 1.7 9.4 6 - 7 ' 8.5? 1855 R Aurigae 5 9 13 + 53 28.4 4.83 0.07 5 5 36 + 53 25.0 6.5 6.5- 7.8 12.5-12.7 1923 S Aurigae 20 31 + 34 3.7 3.96 0.06 17 33 + 34 2.1 6.7 9.4-11.0 <14.5 1944 S Orionis 24 5 — 4 46.4 2.96 0.05 21 51 — 4 48.7 6.4 8.3- 9.5 11.0-13.0 1953 T Aurigae 25 34 +30 22.2 3.85 0.05 22 41 + 30 19.9 - 4.5 , <15 1981 S Camelopardalis 30 13 + 68 44.6 6.48 0.04 25 22 + 68 42.5 7.8* 8.5 12 1986 T Orionis 30 56 — 5 32.4 2.94 0.04 28 43 — 5 34.5 9.7 13 2013 U Aurigae 35 32 + 31 59 3.90 0.04 32 37 + 31 57 7.5* 8.6 12 2098 a Orionis 49 45 + 7 23.3 3.25 0.02 47 19 + 7 22.9 6 1 1.4 2100 U Orionis 5 49 53 + 20 9.5 3.56 + 0.01 5 47 13 + 20 8.7 7 6.4- 7.5 <12 2213 rj Geminorum 6 8 51 + 22 32.2 + 3.62 —0.01 6 6 8 + 22 32.6 3 3.2 3.7- 4.2 (5) No. it/ — TO 100 107 112 114 116 161 209 224 243 320 432 434 466 494 513 6-8 715 782 793 806 814 845 893 906 976 1072 1090 1113 1222 1367 1411 1537 1574 1577 1582 1623 1635 1654 1717 1761 1768 1771 1855 1923 1944 1953 1981 1986 2013 2098 2100 2213 221 170; 145 120 300: 200; 83 131; 149 165: 91.5 112.0 70 119' 127 96 78 140; 70; 89 214; 212 241 194 Elements of Maximum, Greenwich M.T. Epoch (Cal.) (Julian) v Period Inequalities Remarks 1871 Mar. 31=2404515 1859 Mar. 27 2400131 1872 Dec. 27 240 5155 Irregularly periodic? + 445.0 E Periodic inequality + 410.7 E +25 8in(12°E+90°) + 321.0 E .... New star of 1572 .... Irregular .... Irregular .... Newstarof 1885 in ^rtdrom. neb, 1886 Dec. 12 2410253 +276.0 E MiN. 1880 June 23* 9" 28"". +2* 11" 49'"38».25E+95'" sin(0°.08E+283°) 1863Mar. 18 2401583 +610.5 E+50sin(10°E + 60°) 1866 Jan. 4 240 2606 1880 Jan. 8 2407723 1872 Dec. 11 2405139 1866 Nov. 22 240 2928.0' + 405.3 E , + 172.7 E + 207.5 E + 344.15E +13sin(12°E+180°) Periodic inequality Periodic inequality 1872 Mar. 22 2404867 +292.2 E Periodic inequality 1866 Sept. 4 2402849.0 +186.60E +7 sin(5°E+235°) , .... Irregularly periodic? 1866Dec.27 2402963.4 +331.60E +25 sin(4°.5E + 90°) + * .... Irregularly periodic? 1867Mar. 2 2403028.0 +167.0 E Periodic inequality 1884 Dec. 11 2409522 +235.8 E 1890 Sept. 30 2411641 +262 E 1873 Mar. 31 240 5249 +313 E .... Irregularly periodic MiN.1888Jau. 317" 21-" 29S23 +2* 20" 48"- 55.425E + t 1861Sept.'25' 2401044.0 +210.1 E +20 sin(7°.5E+135°) MiN. 1887 Dec. 6" 11" 5T".0 + S^ 22" 52"" 12=. OE Algol-tyi)e. Per. ineq. 145: 1880 Feb. 15 2407761 +141 E 1862 May 1 2401262 +325 E 1860 Feb. 14 240 0455.5 +375.5 E 1891 Dec. 24 2412091 +370 E 1864 Feb. 5 2401907 +280 E Irregular Parkliurst's elements Elements uncertain 1872 Sept. 14 2405051.0 +170.4 E Periodic inequality ? 1855 Mar. 23 239 8666 +380.0 E .... Irregular 1864 Mar. 5 2401936.7 +436.1 E Periodic inequality 1862 Nov. 16 2401461.8 +460.6 E .... Irregularly periodic 1870Feb. 1' 240 4095 +412 E .... New star of 1892 1892 Aug. 22 2412333 1891 Jan. 3l' 2411764 1885 Dec. 7=240 9883 MiN. 1865 Nov. 5 + 111 E Elements very uncertain .... Irregular + 397 E Elements very uncertain .... Irregularly periodic +371 E Periodic inequality + 231.4 E Periodic inequality 13 21 7 7 14 iO 12 4 14 9 43 105 20 8 5 10 31 4 21 10 2 18 12 19 17 (35- Basis of Elements Dates included 2 50 2 1 11 3 2 1 21 15 496 3 53 13 6 11 1 14 1842, 57, 71-91 1827, 55-93 1872-91 1856, 57, 86-92 1828, 80-93 1843, 63-93 1856-85, 92 1879-92 1872-91 1850, 55, 65-91 1848-86,92 1828-46, 58-92 1596-1892 1794, 1841-93 1877, 84-90 1856. 87-92 ' 1871-74, 84-92 1782-1887 1833, 61-92 1796, 1844-92 SXfc. 1880, 87-93 1798, 1856-92 1855-69, 83-93 1891, 92 1864-67,91,92 1826, 54, 71-93 1846-74, 83-92 1 865-83 1862-91 1863-92 1892, 3 1891, 93 1885-93 1844, 65-81 * +25sin(l°.125E+188°.2) f +173'".3 sin(3VE+202°.5) +18">.0 sin(^E +203°.25). See notes. (6) No. Star 1900.0 1900 1856.0 Red- Magnitude R.A Decl. Annual Variation K.A. Decl. ness Max. Min. •2-258 V Auriffae h 111 6 16 is' + 47° 42.5 + 4!54 —0.02 li in s 6 12 54 + 47° 43.5 §.5- 10 <11.5 2266 VMouocerotis 17 41 — 2 8.7 3.02 0.03 15 25 — 2 7.6 3.4 6.9 10.7< 2279 T Monoceiotis 19 49 + 7 8.4 3.24 0.03 17 24 + 7 9.7 2 5.8- 6.4 7.4- 8.2 2362 R Monocerotis 33 42 + 8 49.3 3.28 0.05 31 15 + 8 51.7 9.5 13 2375 S Monocerotis 35 28 + 9 59.3 3.31' 0.05 33 + 10 1.5 2 4.9 5.4 2478 R Lyncis 53 3 + 55 28.1 4,96 0.08 49 20 + 55 31.6. 4.8 7.8- 8.0 <13 2509 f Geminoium 6 58 11 + 20 43.0 3.56 0.09 55 30 + 20 46.7 2. 3.7 4.5 2528 RGetniiiorum 7 1 20 + 22 51.5 3.62 0.09 6 58 37 + 22 55.4 5.7 6.6- 7.8 1 7.4 3881 V Hydrae 46 46 —20 43.2 2.91 0.32 44 34 —20 28.8 9 6.7 9.5 3890 W Leonis 48 21 + 14 14.9 3.18 0.32 45 58 + 14 29.2 3.5* 9 <14 3908 T Carinae 51 18 —59 54.2 2.39 0.32 49 30 —59 44.8 - 6.2 6.9 3934 R Crateris 10 55 38 —17 47.3 2.95 0.32 10 53 26 —17 32.8 8.1 >8 <9 3994 S Leonis 11 5 41 + 6 0.2 3.11 0.32 11 3 21 + 6 14.9 0.0 9.0-10.0 <13 4160, T Leonis 33 19 + 3 55.5 3.08 0.33 31 + 4 10.5 _ 10? <13.5 4300 XVirginis 56 44 + 9 37.7 3.08 0.33 , 54 25 + 9 52.7 _ 8-10 12 4315 R Comae 11 59 7 + 19 20.3 3.08 0.33 11 56 49 + 19 35.4 4.0 7.4- 8.0 <13.5 4377 T Virginis 12 9 29 — 5 28.8 + 3.08 —0.33 12 7 10 — 5 13.8 4.1 8.0- 8.8 10-<13.5' (7) No. M — m 2258 2266 • 2279 2362 2375 2478 2509 2528 2539 2583 26 lO. 2625 2676 2684 2691 2735 2742 2780 2783 2815 2852 2857 2946 2976 3060 3109 3128 3170 3184 3186 3407 3409 3418 3477 3493 3495 3567 3633 3637 3712 3796 3825 3847 3881 3890 3908 3934 3994 4160 4300 4315 4377 7.93 1.84 143: 5.015 121 135 60 134 18.0 164 175 127: 125: 102: 153 170 144 15 86 107 125; Elemelits of Maxinlum, Greenwich M.T. Epoch (Cal.) (Julian) , Period Inequalities Remarks 1886 Dec. 9=2410250 +315 E Elements very uncertain 1883 Feb. 14 2408843 +383.5 E 1885 Apr. 1 240 9633.81 +.27.0037E f: li870Jan. 31 1874 Sept. 15 1888 Jan. 3 1868 Feb. 24 1859 Feb. 28 1872 Mar. 28 MiN. 1887 Mar 1880 Feb. 1 1873 Apr. 19 1863 May 3 1870 Mar. 16 1880 Feb. 14 1852 Feb. 27 1848 Dec. 7 2404094.83 + 3.44305 2405782 +380.0 E Irregular Wininecke's elements ; doubtful 2410640.603+ 10.15382 E See notes 2403387.0 +370.2 E Periodic inequality 2400104.5 +336.5 E Periodic inequality 2404881.0 +136. 50E 26* 15" 18" +1«3''15'"46'.0E ^^^o^-type 240 7747 2405268 2401629 2404138 240 7760 239 7546 2396369.5 + 277.0 E + 45.20 E See notes + 330.3 E +20sin(12°E+30°) + 322.7 E Periodic inequality ? + 410 E + 294 + 288.1 1892 Dec. 15 2412448 + 86.3 E Irregularly periodic M 1881 Mar. 8 1852 Apr. 21 1871 May 20 1853 Apr. 6 240 8148 239 7600.1 2404568 239 7950 + 315 E + 352. 81E +0.207E2 + 271.9 E +307.5E— 0.06E2 MiN. 1867 Aug. 31*14" 2'".89 + 9*ll'> 37"" 45»E Schonfeld's el. Algol-ty^e. 1857 Feb. 13 .2399359 +257.0 E Periodic inequality 1858 Feb. 23 239 9734.5 +289.4 E Schonfeld's elements MiN.1858Jan.26 239 9706 +482 E Mix. 1888 Apr.l3*12"38■".0 + 0*7''46'"48^0E Algol-i^^e. .... Period short 1871 July 31 2404640 +311.5 E Periodic inequality 1865 Mar. 12 2402308.0 +370.5 E +20 sin(10°E+306°) 1757 Apr. 21 2362902.0 +312.90E +25 sin(2°.75E+318°) 1871 July 24 2404633.0 +35.05 E 1882 Apr. 10 -2408546 +274 E Parkhurst's elements 1872 May ' s' 2404922 +148.7 E .... Variability doubtful .... Irregularly periodic? 1853Apr. 7 2397951.2 +302.1 E +15 sin(10°E+190°) .... Irregular 1873 Mar. 15 2405233 +575 E Elements very uncertain 1872 Feb. 12 2404836 +394.3 E Parkhurst's elements .... ' .... "Variability not certain 1860 Dec. 'l" 2400746.0 +190.0 E +25 sin(10°E+60°) \ . i .' . . . .■','. .... t Variability not certain 1856 Dec. is' 239 9502 +361 E 1861 Apr. 26=240 0891 +339.5 E 20 15 6 10 16 9 6 18 16 5 18 10 14 16 1« Basis of Elements m Dates included 7 2 2 23 2 2 6 - 9 15 + 16 18 46 24 10 3 15 7 6 _ 4 3 38 15 5 6 3 18 1 7 8 - 1886, 91, 92 1853, 83-93 1874, 84-92 1796, 1855-92 1859-74, 83-93 1872-74, 86, 91 1887-93 1857, 80-92 1856-92 1854, 70-93 1880-93 1848-73, 86-93 1848-74, 86-93 1881-83, 93 1830, 52-85 1871-89 1853-59, 69-93 1852-86 1851-73, 84, 92 1858-75, 84, 87 1888-93 1752, 1867-92 1796, 1865-87 1757-1890 1871-74, 91, 92 1855, 56, 82-91 1872-80, 91 1843-92 1873-93 1872-91 1859-93 1831, 56, 83-94 1861-75, 84^88 (8) No. Star 1900.0 1900 1856.0 Red- Magnitude R.A Decl. Annual Variation R.A. Decl. ness Max. Min. 4407 R Coivi h in 12 14 27 —18 42.0 + 3!l0 —0.33 h 111 a 12 12 8 —18° 26.9 3.7 6.8- 7.7 <11.5 4492 Y Virginis 28 44 — 3 52.3 3.08 0.33 26 25 — 3 37.3 3.6 8 - 9.4 11.5-13 4511 T Ursae Majoris 31 50 + 60 2.3 2.75 0.33 29 47 + 60 17.2 2.0 6.0- 8.5 12.2-13.0 4521 R Virginis 33 26 + 7 32.3 3.05 0.33 31 9 + 7 47.2 1.3 6.5- 8.0 9.7-11.0 4536 R Muscae 35 58 —68 51.5 3.61 0.33 33 17 —68 36.7 - 6.6 7.4 4557 S Ursae Majoris 39 34 + 61 38.4 2.63 0.33 37 35 + 61 53.3 3.2 6.7- 8.2 10.2-11.5 4596 U Virginis 12 46 1 + 6 5.8 3.04 0.33 12 43 45 + 6 20.6 1.1 7.7- 8.1 12.2-12.8 4731 S Canum Venat. 13 8 31 + 37 54.5 2.77 0.32 13 6 24 + 38 8.9 6.3* 7.3 9 4805 W Virginis 20 52 — 2 51.5 3.09 0.31 18 33 — 2 37.4 0.4 8.7- 9.2 9.8-10.4 4816 V Virginis 22 38 — 2 39.2 3.09 0.81 20 19 — 2 25.2 2.7 8.0- 9.0 <13 4826 R Hydrae 24 15 —22 45.9 3.27 0.31 21 48 —22 31.8 5.9 3.5- 5.5 9.7 4847 S Virginis 27 47 — 6 40.8 3.13 0.81 25 26 — 6 26.8 2.6 5.7- 7.8 12.5 4940 WHydrae 43 23 —27 52.0 3.38 0.30 40 51 —27 38.5 7 6.7 8.0 4948 RCauum Venat. 44 39 + 40 2.4 2.58 0.30 42 43 + 40 15.9 _ 6.7- 7.0 11.5 :)037 RR Virginis 13 59 35 — 8 43.1 3.17 0.29 13 57 12 — 8 30.0 _ >11 <14 5070 Z Virginis 14 4 58 — 12 49.8 3.23 0.29 14 2 33 —12 36.5 - 9.5-11 <14 5095 R Centauri 9 22 —59 26.9 4.28 0.28 6 10 —59 14.1 6 6.0- 6.3 8.7- 9.8 5097 T Bootis 9 25 + 19 32.0 2.82 0.28 7 18 + 19 44.7 _ 9.7? 11 <13 (9) No. M—m 4407 4492 4511 4521 4536 4557 4596 4731 4805 4816 4826 4847 4940 4948 5037 5070 5095 5097 5156 6157 5190 5194 5237 5249 5274 5319 5338 5374 5402 5430 5438 5465 5484 5494 5501 5504 5588 5593 5617 5644 5667 5675 5677 5682 5688 5704 5713 5732 5758 5761 5770 5776 85: 107.5 68.5 0.295 113.0 88 8.20 190 157: 60: 79 130 135 97 101.5 80 105 0.83 100: 116 80 171 151 Elements of Maximum, Greenwich M.T. Epoch (Cal.) (Julian) Period Inequalities llemarks 1868 June 11=2403495.8 1883 Mar. 10 2408880 1860 Oct. 21 1809Jiiue 1871 Aug. 16 1860 June 24 Periodic inequality ? + 317.2 E + 218.8 E 2400705.8 +257.2 E +20 sin(9°E+90°) 238 1934.8 +U5.47E +20 sin(f°E+216°) + 4.8 sin(^°+343°) 240 4656.656+ 0.882263 E 2400586.0 +226.1 E +43 8in(5°.76E+181°.5) 1866June25 2402778.0 +207.0 E Periodic inequality 1866 Apr. 16 1860 Feb. 15 1891 July 17 1852 Jan. 24 1889Feb. 27 1888 Mar. 25 1879 May 13 1880 May 25 240 2708.2666 +17.271 IE 240 0456.5 +250.5 E 2411931.0 +425.15E— 0.36E2+15sin(7°.5E + 202°) 2*0-7512 +376.4 E +20 siD(7°.5E+180°) 2411061 +384 E 2410722 +340 E 240 7483 +217 E 240 7861 +305 E 1871 May 25 2404573 +160.5 E 1880 Julv 3 1863 Apr. 13 1869 Aug. 29 1884 Aug. 30 1858 June 8 1882 Apr. 30 ^40 7900 2401609.0 2403939 2409419 239 9839 2408566 .... Only one appearance known + 121.5 E + 274.0 E— 0.073E2 + 269.5 E Periodic inequality + 256 E Dundr's elements + 223.4 E +10sin(10°E + 80'') + 370 E .... Irregular 1880 Mar. 25 MiN. 1867 Oct. 240 7800.5 25*9''17'".5 1878 Apr. 30 1861 June 22 240 7105 240 0949 + 173.8 E + 2i7"51™22».8E 0.98 + 238 E + 327 E Algol-ty^Q 1871 Julv 14 240 4623.71+ 3.38922E MiN. 1870 Mar. 25* 10''38'".5 +3* 10" 51™ 12».4E -0^0018E^ 4Z^oZ-type 1874 June 17 240 5692 +192.3 E 1828 Apr. 16 2388829^ +365.1 E +59 sin(6°E + 8°) 1860 Aug. 24 2400647 +360,8 E 1878 July 17 1878 May 27 1873 July 23 1878 May 4 240 7183 2407132 2405363 2407109 + 163.6 + 206 + 226.2 + 295 Periodic inequality ? Irregular 1878 Oct. 21 1827 May 14 240 7279 2388491 + 356.5 E + 357,2 E +35sin(4°.5E + 22°.o) 1858 Apr. 6 1885 June 17 239 9776 2409710 1873 May 31 240 5306 1865 July 18 240 2436 1876Apr. 19=2400634 + 730 + 277.0 6.3 + 368 + 317.7 + 199.0 E E New star of 1866 -1-20 sin (12°E + 324°) M 12 4 35 87 liJ 54 20 41 15 24 17 5 6 8 7 32 31 4 31 3 11 9 30 28 13 9 11 4 13 30 4 5 9 21 9 Basis of Elements m Dates included 2 13 28 15 32 45 7 6 7 3 17 5 93 3 37 1 10 1796, 1851-90 1882-93 1843, 60-93 1809-91 1871-92 1790, 1843-92 1813-31, 57-93 1866-72, 89-92 1857-75, 83-92 1784-1890 1795, 1824-93 1875, 89-93 1858, 85-91 1873, 79-92 1855, 80-91 1871-78,91, 92 1880-84,, 88-9 2 1790, 1865-92 1862-92 1884-92 1858-90 1880-89 1857, 80-93 1797, 1837-88 1878-92 1861, 78, 87, 88 1871, 72, 91 1858-89 1874-93 1794, 1828-92 1860-92 1878-93 1878-92 1849, 73-93 1878-86 1857-61, 78-92 1783, 1827-90 1858-68, 84 1851, 85-91 1854, 73-92 1825, 56-92 1876-91 (10) No. Star 19000 1900 1855.0 Hed- Magnitude II.A. Decl. Annual Variation E.A. Decl. ness Max. Min. 5795 WScorpii li m 8 16 5 55 —19 52.6 + 3'.50 —0.16 h m s 16 3 18 — 19° 45. '3 _ 10-11.2 <14.7 5826 T Scorpii 11 5 —22 43.6 3.57 0.15 8 25 —22 36.7 _ 7.0 <12 5830 R Scorpii 11 41 —22 41.9 3.57 0.15 9 1 —22 35.0 0.9 9.4-10.5 <13 . 5831 S Scorpii 11 42 —22 39.0 3.57 0.15 9 2 —22 32.0 9.1-10.5 <13 5856 WOpliiiichi 16 2 — 7 27.5 3.23 0.15 13 36 — 7 21.3 6 8.9- 9.5 <13.5 5860 U Scorpii 16 45 —17 38.5 3.46 0.15 14 10 —17 1.9 - 9? <12 5887 V Ophiuchi 21 10 —12 12.0 3.33 0.14 18 40 —12 5.5 6.6 7.0- 7.5 9.6-10.5 6889 U Hevculis 21 22 + 19 7.2 2.65 0.14 19 23 + 19 13.6 6.5 6.6- 7.8 11.4-12.7 5903 Y Scorpii 23 49 —19 13.3 3.50 0.14 21 12 -19 7.1 _ 10? 14 5912 g Herculis 25 21 +42 6.1 1.97 0.13 23 53 + 42 12.2 3 . 4.7- 5.5 5.4- 6.0 5928 T Ophiuchi 28 1 —15 55.2 3.42 0.13 25 27 —15 49.2 - 10 <12.5 5931 S Ophiiicbi 28 30 —16 57.0 + 3.45 0.13 25 55 —16 51.1 1 8.3- 9.0 1 ? 6368 X Sagittarii 41 16 —27 47.6 3.77 0.03 38 26 —27 46.2 1 4 6 6404 Y Ophiuchi 47 17 — 6 7.1 3.22 —0.02' 44 52 — 6 6.2 - 6.2 7.0 6472 W Sagittarii 17 58 38 —29 35.1 3.83 0.00 17 55 45 —29 34.9 1 4.8 5.8 6512 T Herculis 18 5 19 + 31 0.2 2.27 + 0.01 18 3 37 + 30 59.9 1.4 6.9- 8.5 9.8-12.7 6573 Y Sagittarii 15 30 —18 54.3 3.53 0.02 12 51 —18 55.2 5.8 6.6 6624 T Serpentis 23 56 + 6 14.0 2.93 0.03 21 44 + 6 12.5 2.0 9.1-10.5 <13.5 6636 U Sagittarii 26 —19 11.7 3.54 0.04 23 21 —19 13.3 3.7 7.0 8.3 6682 X Ophiuchi 33 35 + 8 44.4 2.87 0.05 31 26 + 8 42.3 5 ■ 6.8 , 9.0 6726 T Aquilae 40 56 + 8 38.3 2.87 0.06 38 47 + 8 35.7 3.3 8.8 10.0 6733 RScuti 42 9 — 5 48.7 3.21 0.06 39 45 — 5 51.4 4 4.7- 5.7 6.0- 9.0 6758 (i Lyrae 46 23 +33 14.8 2.21 0.07 44 44. + 33 11.8 1 3.4 4.5 6760 K Pavonis 46 38 —67 21.5 6.21 0.07 41 58 —67 24.4 - 4.0 5.5 6794. R Lyrae 52 17 +43 48.8 1.82 0.08 50 55 + 43 45.5 4 4.0 4.7 6806 S Coronae austr. 54 26 —37 5.3 4.06 0.08 51 22 —37 8.6 — <9.5 13.0 6811 R Coronae austr. 55 9 —37 5.6 4.06 0.08 52 8 —37 8.8 - 9.8-11.5 13.2 6812 T Corouae anstr. 55 14 —37 6.4 4.06 0.08 52 12 —37 9 - <9.8 13 6834 V Aquilae 18 59 4 — 5 50.0 3.21 0.09 56 40 — 5 53.7 6.3* 6.5 8.0 6849 R Aquilae 19 1 33 + 8 4.8 2.89 0.09 18 59 23 + 8 0.8 5.5 5.9- 7.4 10.9-11.5 6903 T Sagittarii 10 28 —17 8.-7 3.47 0.10 19 7 52 -17 13.2 6.5 7.6- 8.1 <11 6905 R Sagittarii 10 49 —19 29.0 3.52 0.10 8 11 —19 33.5 3.6 7.0- 8.0 12.5 6921 S Sagittarii- 13 35 —19 12.4 3.51 0.11 10 57 — 19 17.1 9.1-10.4 14.5 6923 Z Sagittarii 13 47 —21 6.6 3.56 0.11 n 7 —21 11.2 2 8.5 <12 6984 U Aquilae 23 58 — 7 15.0 3.23 0.12 21 33 — 7 20.3 6.4 7.1 7045 R Cygui 34 8 + 49 58.5 1.61 0.13 32 56 + 49 52.5 6.0 5.9- 8.0 <14 7085 RT Cygni 40 50 +48 31.9 1.70 0.14 39 33 + 48 25.5 - 7? U? 7101 11 Vnlpeculae 43 28 + 27 4.2 2.46 0.15 41 37 + 26 57.7 - 3 ?, 7106 S Vulpeculae 44 18 + 27 2.3 2.46 0.15 42 27 + 26 55.7 3.0 8.4- 8.9 9.0-10.0- 7120 X Cygni 19 46 44 + 32 39.7 + 2.31 + 0.15 19 45 + 32 33.0 1 6.5 4.0- 6.5 13.5 (11) No. 5795 5826 5830 5831 5866 5860 5887 5889 5903 5912 5928 5931 5948 5950 5952 5955 6005 6044 6083 6132 6181 6189 6202 6268 6368 6404 6472 6512 6573 6624 6636 6682 6726 6733 6758 6760 6794 6806 6811 6812 6834 6849 6903 6905 6921 6923 6984 7045 7085 7101 7106 71-20 M — in 146; Elements of Maximum, Greenwich M.T. Epoch (Cal.) (Julian) Period Inequalities Remarks 167 125 112 148 1876 May 26=240 6401 1863 Mar. 25 2401590.5 1837 June 1 239 2162.4 1881July 10 2408272 1874 May 16 240 5660 I86ON0V. 8 2400723 1876 June 26 240 6432 2.876 6.250 3.00 78.0 1.80 2.97 196 35 4.0 15.0 144 158: 110:; 2.25 150 26.5 171.5' I860 Apr. 6 240 0507 1857 June 29 2399495 • 1879 July 12 240 7543 1877 Apr. 5 240 6715.8 1856 Sept. 9 239 9202 1857 July 11 239 9567 + 222.3 E .... New star of 1860 in Messier 80 + 224.0 E Periodic inequality + 176.7 E + 331.3 E .... Only one appearance known + 304 E + 409 E Periodic inequality ? + 359 E .... Irregular + 361 E + 233.8 E .... Irregularly periodic + 280.0 E +25sin(15°E+330°) 20.5 + 245.6 E + 307.6 E +45 sin(10°E + 90°) .... New star of 1848 + 302.9 E .... Irregular Mm. 1881 Julyl7il4''45'".0+20'^7'"42^56E+80'"siu(0°.0225E+140°.0) ' . . . . Irregularly periodic .... New star of 1604 1870Aug.l6 2404291.78+ 7.01185E 1882 Sept. 4 2408693.43+ 17.12564E Sawyer's elements 1866 Sept. 4 240 2849.45+ 7.59460E 1868 Mar. 9 2403401.0 +164.85 E +8 sin(7°E+59°) 1886Sept.25 2410175.02+ 5.7732 E 1861 May 11 2400907.0 +342.3 E 1870 July' 1 2404245.00+ 6.7446E 1886 Apr. 15 2410012 +354 E .... Irregular 1886 Aug. 22 2410141 + 71.1 E MIN.1855Jan.6''14>'28"■.7+12121M6'"58^3E+0^4217E^— 0.00007E' 1871 Dec. 3 2404765 + 9.102E / 1887 Oct. 16 2410561 1856 Aug. 5 239 9.167 1866 Sept. 10 240 2855 1866 July 18 240 2801 1866 Sept. 25 240 2870 + 46.0 E ' 30.6 ' -1-351. 0E—0.34E + 384E + 268.7 E +20sin(14°.4E + 296°) + 230.6 E Periodic inequality 1886Sept.20 1854 Oct. 16 2410170.146+ 7.02645E 239 8508.9 +425.7 E Yendell's elements New star of 1670 '2 240 2239.0 +' 6V.50E +4 sin_(3^6E + 20°) M Basis of Elements Dates included 11 2'i 23 16 3 5 7 12 17 21 9 388 25 37 15 1763 JuSe 3=2365i36.5 +406.02 E +0.0075E^+25 sin(5°E + 272°) 16 6 14 10 45 25 48 85 98 367 26 28 22 7 1876-92 1837-53, 63-91 1837, 39, 54-83 1823, 81-93 1874-92 1860-85, 93 1876, SO, 83 1860, 69-74, 83 1857-71, 89-93 1857, 79-92 1790, 1858-92 1840-90 1847, 57-90 1863, 71, 81-92 1866-88 1882, 86-91 1856-92 1861-74, 83-89 1854, 86-92 1871-73, 83, 91 5 1854-59, 69-92 l8Ci5-70, 83 1 1849, 58-92 1 1863-71,83-92 1886-92 1817, 52-92 44 1836, 37, 62-86 8 1687-1891 (12) No. Star 1900.0 1900 1855.0 Red- Magnitude R,A. Decl. Annual Variation R.A. Decl. ness Max. Min. . 7124 7] Aquilae h m 8 19 47 23 + 0°44'.9 + 3.06 + 0.15 h m B' 19 45 5 + 0°38'.2 2 3.5 4.7 7149 S Sagittae 51 29 + 16 22.2 2.73 0.16 49 25 + 16 16.4 5.6 6.4 7192 Z Cygni 19 58 38 + 49 45.9 1.70 0.17 19 57 21 + 49 38.4 9.0* 7.1- 8.5 11.5-12 7-220 S Cygni 20 3 24 + 57 41.9 1.26 0.17 20 2 28 + 67 34.2 5.1 8.8-11.3 <14.5 7234 R Capricorni 5 42 —14 33.8 3.37 0.17 3 10 — 14 41.6 4 8.8- 9.7 <13 7242 S Aquilae 7 1 + 15 19.4 2.76 0.18 4 57 + 15 11.5 0.8 8.4-10.1 10.7-11.8 7252 W Capricoi'ni 8 36 —22 16.8 3.54 0.18 5 57 —22 24.8 _ 10.2-10.5 <14.7 7267 R Sagittae 9 30 + 16 25.4 2.74 0.18 7 27 + 16 17.4 0.8 8.5- 8.7 9.8-10.4 7259 RS Cygni 9 45 +38 27.8 2.18 0.18 8 7 + 38 17.4 9.4* 6.8 8.3-10 7261 RDelpliini 10 5 + 8 47.1 2.90 CIS 7 65 + 8 39.1 4.0 *!.6- 9.0 11.1-12.8 7285 P Cygni • 14 6 + 37 43.3 2.21 0.18 12 27 + 37 36.1 2 3-5 ^ <6 7299 UCvgni 1'6 30 + 47 34.7 1.86 0.19 15 It + 47 26.3 9,3 7.0- 8.1 9.4-11.6 7428 V Cygni 38 5 + 47 47.1 1.93 0.21 ?6 28 + 47 37.5 8.3 6.8- 9.5 13.5 7431 S Delpliini 38 28 + 16 43.7 2.76 . 0.21 36 24 + 16 34.2 6.0 8.4- 9.5 10.4-12.0 7437 X Cvgni * 39 29 + 35 13.6 2.35 0.21 37 44 + 35 4.0 6.4 7.2-7.7 7444 TDelphini 40 43 + 16 2.1 2.78 0.22 38 38 + 15 52.6 2.0 8.2-10.3 <13 7446 U Delphini 40 53 + 17 43.7 2.75 '0.22 38 50 + 17 34.0 7 6.4 7.3 7455 U Gapricorni 42 34 —15 9.1 3.36 0.22 40 4 -16 18.8 _ 10.2-10.8 <13 7466 RR Cygni 42 37 + 44 30.2 2.07 0.22 41 3 + 44 20.4 6.7* 8.1- 8.7 9.8- 9.7 7459 T Cygni 43 11 + 34 0.4 2.39 0.22 41 24 + 33 60.6 1 5.5? 6? 7468 T Aquarii 44 40 — 5 31.1 3.17 0.22 42 17 — 5 40.9 1.2 6.7- 8.7 12.4-13.0 7483 T Vulpeculae 47 13 + 27 52.5 2.56 • 0.22 45 19 + 27 42.3 5.5 6.5 74S8 Y Cygni 48 4 + 34 17.0 2.40 0.22 46 16 + 34 7.0 7.1 7.9 7660 R Vulpeculae 20 59 56 + 23 25.5 2.66 0.24 67 56 + 23 14.9 2.0 7.5- 8.5 12.5-13.6 7571 V Capricorni 21 1 47 —24 19.3 3.50 0.24 20 59 9 —24 30.2 9 14? 7577 "X Capricorni 2 50 —21 45.1 3.44 0.24 21 15 —21 55.8 - 9.5-10 <16.2 7609 T Cephei 8 13 + 68 5.0 0.81 0.24 7 33 + 67 54.4 6.3 5.2- 6.8 9.6-9.9 7659 T Capricorni 16 30 — 15 35.0 3.32 0.25 14 —15 46.4 2 8.8- 9.7 13 5 7733 Y Capricorni 28 55 —14 26.1 3.28 0.26 26 27 —14 36.9 _ 10? 14? 7754 W Cygni 32 14 + 44 55.6 + 2.27 0.2.7 30 34 + 44 4.3.7 4.2* 5.0- 6.3 . 6.1-6.7 7779 S Cephei 39 28 + 78 10.3 —0.67 0.27 36 57 + 77 58.2 9.1 7.4- 9.2 11,5 7783 RU Cygni 37 19 + 53 52.2 + 2.00 0.27 35 46 + 53 40.0 ■7.^ 3 9.1 7787 Q Cygni 37 47 + 42 23.1 2.86 0.27 36 1 + 42 11.0 3 13.5 7795 RV Cygni . 39 8 + 37 33.6 2.48 0.27 37 18 + 37 21.2 9.0* 7.1-7.8 8.8-9.3 7803 /u. Cephei 40 27 + 58 19.3 1.83 0.27 39 4 + 58 7.0 6.2 4? 5? 7907 U Aquarii 57 52^ —17 6.6 3.28 0.29 55 24 —17 19.5 - 1.0? 14? 7909 S Piscis austrini 21 58 2 —28 32.0 3.44 0.29 21 55 27 —28 44.9 8.7- 9.2