On the correctness of orbital solutions obtained from a small set of points.Orbit of HIP 53731

作     者：Arina Mitrofanova Vladimir Dyachenko Anatoly Beskakotov Yury Balega Alexander Maksimov Denis Rastegaev Sergey Komarinsky Arina Mitrofanova;Vladimir Dyachenko;Anatoly Beskakotov;Yury Balega;Alexander Maksimov;Denis Rastegaev;Sergey Komarinsky

作者机构：Special Astrophysical Observatory of the Russian Academy of SciencesNizhnij ArkhyzRussia 369167 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2020年第20卷第11期

页      面：321-324页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：RFBR project number 20-32-70120。 

主　　题：techniques high angular resolution,speckle interferometry stars low-mass,fundamental parameters stars binaries spectroscopic stars individual HIP 53731 

摘      要：HIP 53731 is a binary consisting of stars of the spectral types K0 and K9.The orbit of this object was constructed previously by Cvetkovic et al.and improved by Tokovinin.It should be noted that there is a 180°ambiguity in the position angles of some published measurements.Speckle interferometric observations were obtained in 2007–2020(21 measurements)at the 6-m telescope of the SAO RAS(BTA)by the authors of this article.The analysis of new data together with previously published ones made it possible to construct an accurate orbit of HIP 53731 and to halve the already known values of the orbital period of the system.As a result of the study,the mass sum,the masses of each component and their spectral types were determined by two independent methods.According to the qualitative classification of orbits,the orbital solution has grade 2–good(observations cover more than half of the orbital period and correspond to different phases).