CHAPTER III. 
267 V ANDROMEDA. 
R. A. oh 44m 39.7s ; Dec. +35° 6' 30" (1900). 
The announcement of the discovery of this variable by Anderson was received 
in the Astronomische Nachrichten, 142 , T 59> m January, 1897. Observations 
began at once and the definitive notation was published by Chandler in Astronom¬ 
ical Journal, Y!, 87, February, 1897. Some confusion arose from an apparent con¬ 
tradiction between the observations of Yendell and the writer (noted by Hartwig 
in the Vierteljahrsschrift, 32 . 187), occasioned by a misidentification explained 
in Astronomical Journal, 8 , 62. Some trouble may also arise from the fact that 
the Chandler number of the star is given as 268 in the Nachrichten, 160 , 335, and 
in the Harvard Provisional Catalogue of Variables, Annals, 48 , 96, whereas that 
number was assigned by Chandler to X Sculptoris in the Journal, 17 , 88. 
As Hartwig’s observations of the star are not yet published, there are only 
available for comparison three isolated observations by Esch in the Nachrichten, 
160 , 335,thestar being found invisible in February, 1902 (then 13m bymy curve) 
and 9.3 111 , 1902 August 22. 
The positions of the variable (relative to the star a, in Leyden A. G. Cat.) 
and the brighter comparison stars were measured with the 6-inch, the fainter 
stars with the 40-inch, and all positions were checked from the photograph. 
The three fundamental magnitude stars (Table 15) are white, which perhaps 
accounts for the small residuals and the close agreement of the results with the 
Potsdam values. 
The mean light-curve was formed from the observations up to February, 1905. 
It bears a close resemblance to that of T Andromedae, the only difference being 
the length of the period. No halting in the regular change has been observed, 
but there is a range of more than a magnitude in the brightness at different max¬ 
ima and half a magnitude at the minima. A pair of ordinary and isochromatic 
plates taken 1904 November 15, showed no color difference between the variable 
and the comparison stars d, e, and m. 
The revised elements given by Chandler in Astronomical Journal, 18 , 94, 
Max.=1896 Nov. 5 (3869)+263 E 
as well as Hartwig’s ephemeris in Vierteljahrsschrift, 39 , 262, call for a maximum 
epoch 12, 1905 June 28. The observed date, May 5, though dependent on a 
small number of observations, does not seem liable to an error greater than 10 
days, so that the Chandler period is evidently too long. The present set of 
observations are best satisfied by a period of 259 days, as given at the head of 
Table 23. 
31 
