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Short- and long-term variability of the ultrashort-period eclipsing RS CVn star V0648 Aur

Paunzen, E.; Srdoc, G.; Bernhard, K. +2 more

Based on observations between 2006 and 2018, revised elements of the ultrashort-period eclipsing RS CVn variable V0648 Aur are given: HJD MinI =2457800.356(3) + 0.42246710(7)°E. An analysis of the observed times of minima reveals a probable near sinusoidal oscillation with a period of about 800 days. The corresponding (O-C) values of the secondary…