Davoudi, FatemehPoro, AtilaAlicavus, FahriHalavati, AfshinDoostmohammadi, SaeedShandadi, AmirAbbasVahedi, Sareh2025-01-272025-01-2720202543-6376https://doi.org/10.1515/astro-2020-0013https://hdl.handle.net/20.500.12428/28591New observations of the eclipsing binary system V1848 Ori were carried out using the V filter resulting in a determination of new times of minima and new ephemeris were obtained. We presented the first complete analysis of the system's orbital period behavior and analysis of O-C diagram done by the GA and MCMC approaches in OCFit code. The O-C diagram demonstrates a sinusoidal trend in the data; this trend suggests a cyclic change caused by the LITE effect with a period of 10.57 years and an amplitude of 7.182 minutes. It appears that there is a third body with mass function of f (m(3)) = 0.0058 M-circle dot in this binary system. The light curves were analyzed using the Wilson-Devinney code to determine some geometrical and physical parameters of the system. These results show that V1848 Ori is a contact W UMa binary system with the mass ratio of q = 0.76 and a weak fillout factor of 5.8%. The O'Connell effect was not seen in the light curve and there is no need to add spot.eninfo:eu-repo/semantics/openAccessphotometryephemerissinusoidalindividual: V1848 OriArticle291728010.1515/astro-2020-0013Q4WOS:0005560982000012-s2.0-85091242994Q3