Abstract New 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 (m3) = 0.0058 M⊙ 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.

中文翻译：

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Eclipsing Binary V1848 Ori 的新数据以及改进的轨道和光曲线解决方案

摘要 使用 V 滤波器对食双星系统 V1848 Ori 进行了新的观测，从而确定了新的最小值和新星历的时间。我们首次对系统的轨道周期行为进行了完整分析，并在 OCFit 代码中通过 GA 和 MCMC 方法完成了对 OC 图的分析。OC 图显示了数据的正弦趋势；这一趋势表明由 LITE 效应引起的周期变化为 10.57 年，振幅为 7.182 分钟。在这个双星系统中，似乎存在质量函数为 f (m3) = 0.0058 M⊙ 的第三个物体。使用 Wilson-Devinney 代码分析光变曲线以确定系统的一些几何和物理参数。这些结果表明，V1848 Ori 是一个接触 W UMa 二元系统，质量比为 q = 0.76，弱填充因子为 5.8%。光变曲线中没有看到奥康奈尔效应，无需添加光斑。