Bulut, A.Bulut, I.Cicek, C.Erdem, A.2025-01-272025-01-272017978-0-7354-1483-90094-243Xhttps://doi.org/10.1063/1.4976439https://hdl.handle.net/20.500.12428/2793032nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, the orbital period variations of two eclipsing binary systems showing apsidal motion were studied. Their O - C diagrams were analysed using all reliable eclipse timings and the elements of apsidal motion of two systems were improved. We found periods of apsidal motion of V796 Cyg and V2783 Ori to be 32.7 +/- 0.2 years and 415 +/- 50 years, respectively.eninfo:eu-repo/semantics/closedAccessEclipsing binary starsapsidal motionindividual: V796 Cyg and V278.1 OriConference Object181510.1063/1.4976439N/AWOS:0004352051000952-s2.0-85016039402Q4