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"Peremennye Zvezdy", Prilozhenie, vol. 8, N 34 (2008)

Period and Probable Variability Type of GSC 02684-00774

J. Greaves
Northants, England, UK

ISSN 2221–0474

Received:   21.07.2008;   accepted:   6.11.2008
(E-mail for contact: bydra@safe-mail.net)

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Star Name: GSC 02684-00774, NSVS 8493397, MSX6C G073.7003+00.3031 Coordinates (J2000): 20 16 03.04, +35 42 07.4 Variability type: BY;   Limits, System: 10.65 - 11.05 (ROTSE1);     Period: 11.8 d;   Epoch(max): JD

Remarks:

Nicholson and Scottish (2006) wrote that this star is an EB eclipser of 1.8347 day period using NSVS data (Wozniak et al. 2004). In fact those data actually show the period to be 11.8 days, and the lightcurve morphology as revealed by a phase plot upon that period, in tandem with the Carlsberg Meridian Catalogue 14 r' = 11.01 and 2MASS J = 7.39 and Ks = 6.31 magnitudes, show this object to be a rotation variable most likely of the BY Draconis variety. However, a slightly extincted rotational variable of the eclipse free RS CVn variety is not entirely precluded.

References:

Nicholson, M., Scottish, C., 2006, OEJV 30, 1 Wozniak, P.R., et al., 2004, Astron. J., 127, 2436