Photometric Observation and Apsidal motion Study of V1143 Cyg

Abstract

Photometric observations of the eccentric eclipsing binary V1143 Cygni were performed during the August-September 2000 and July 2002, in B and V bands of the Johnson system. The analysis on both light curves was done separately using the 1998 version of Wilson's LC code. In order to find a new observed rate of apsidal motion, we followed the procedure described by Guinan and Maloney (1985). A new observed rate of apsidal motion of 3.72 degrees/100yr was computed which is close to the one reported earlier by Khaliullin (1983), Gimenez and Margrave (1985), and Burns et al.(1996).