The results of a study on the binary HIP 18856 and construction of its orbit are presented. New observational data were obtained at the BTA of SAO RAS in 2007-2019. Earlier, Cvetković et al. constructed the orbit for this system. However, it is based on six measurements, which cover a small part of the orbit. The positional parameters of the ESA astrometric satellite Hipparcos published speckle interferometric data (Mason et al., Balega et al., Horch et al.) and new ones were used in this study. Based on the new orbital parameters, the mass sum was calculated and the physical parameters of the components were found. The obtained orbital and fundamental parameters were compared with the data from the study by Cvetković et al.. The comparison shows that the new orbital solution is better than the old one, since it fits new observational data accurately. Also based on a qualitative evaluation performed by Worley & Heintz, the new orbit was classified as “reliable”, which means data cover more than half of the orbit with sufficient quantities of residuals of measurements.

介绍了对双星 HIP 18856 及其轨道构建的研究结果。2007-2019 年在 SAO RAS 的 BTA 获得了新的观测数据。早些时候，Cvetković 等人。为这个系统构建了轨道。然而，它基于六次测量，覆盖了轨道的一小部分。ESA 天文测量卫星Hipparcos的位置参数发表的散斑干涉测量数据（Mason 等人、Balega 等人、Horch 等人）和新的用于本研究。基于新的轨道参数，计算质量总和并找到组件的物理参数。将获得的轨道和基本参数与 Cvetković 等人的研究数据进行了比较。比较表明，新的轨道解比旧的更好，因为它准确地拟合了新的观测数据。同样基于 Worley & Heintz 进行的定性评估，新轨道被归类为“可靠”，这意味着数据覆盖了一半以上的轨道，并具有足够数量的测量残差。