TY - JOUR

T1 - On the correctness of orbital solutions obtained from a small set of points. Orbit of HIP 53731

AU - Mitrofanova, Arina

AU - Dyachenko, Vladimir

AU - Beskakotov, Anatoly

AU - Balega, Yury

AU - Maksimov, Alexander

AU - Rastegaev, Denis

AU - Komarinsky, Sergey

N1 - Publisher Copyright: © 2020 National Astronomical Observatories, CAS and IOP Publishing Ltd..

PY - 2020/11/1

Y1 - 2020/11/1

N2 - HIP 53731 is a binary consisting of stars of the spectral types K0 and K9. The orbit of this object was constructed previously by Cvetković 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).

AB - HIP 53731 is a binary consisting of stars of the spectral types K0 and K9. The orbit of this object was constructed previously by Cvetković 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).

KW - Binaries: Spectroscopic-stars

KW - Fundamental parameters-stars

KW - High angular resolution

KW - Hip 53731

KW - Individual

KW - Low-mass

KW - Speckle interferometry-stars

KW - Techniques

UR - http://www.scopus.com/inward/record.url?scp=85097230469&partnerID=8YFLogxK

U2 - 10.1088/1674-4527/20/11/187

DO - 10.1088/1674-4527/20/11/187

M3 - Article

AN - SCOPUS:85097230469

VL - 20

JO - Research in Astronomy and Astrophysics

JF - Research in Astronomy and Astrophysics

SN - 1674-4527

IS - 11

M1 - 187

ER -