Ephemerides of Asteroid Satellites and Estimation of Their Accuracy     

Emel’yanov  N. V.  Arlot  J.-E.  Hestroffer  D.  Varfolomeev  M. I.  Beskakotov  A. S. 《Solar System Research》2022,56(5):308-317

Solar System Research - The article presents new results on motion modeling and creation of ephemeris of satellites of asteroids based on observations. In previous work on the project, ephemeris of...  相似文献   

Detection of the binarity of the star J1158+4239     

M. Yu. Khovrichev  A. M. Kulikova  E. N. Sokov  V. V. Dyachenko  D. A. Rastegaev  A. S. Beskakotov  Yu. Yu. Balega  B. S. Safonov  A. V. Dodin  O. V. Vozyakova 《Astronomy Letters》2016,42(10):686-692

One of the goals of the Pulkovo program of research on stars with large proper motions is to reveal among the low-luminosity stars those that have evidence of binarity. Twelve astrometric binary candidates from the Pulkovo list have been included in the program of speckle observations with the BTA telescope at the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) and the 2.5-m telescope at the Caucasus Observatory (CO) of the Sternberg Astronomical Institute of the Moscow State University to confirm their binarity and then to determine the parameters of the revealed stellar pairs. The binarity of the brightest of these stars, J1158+4239 (GJ 3697), has been confirmed. Four sessions of speckle observations with the BTA SAO RAS telescope and one session with the 2.5-m CO telescope have been carried out in 2015–2016. The weighted mean estimates of the pair parameters are ρ = 286.5 ± 1.2 mas and θ = 230.24? ± 0.16? at the epoch B2015.88248. The magnitude difference between the pair stars is Δm = 0.55 ± 0.03 (a filter with a central wavelength of 800 nm and a FWHM of 100 nm) and Δm = 0.9 ± 0.1 (an R filter).  相似文献   

Research on the HIP 18856 binary system     

Polina Efremova  Arina Mitrofanova  Vladimir Dyachenko  Anatoly Beskakotov  Alexander Maksimov  Denis Rastegaev  Yury BalegaSergey Komarinsky 《天文和天体物理学研究(英文版)》2021,(3):69-72

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,Cvetkovic 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 Cvetkovic 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.  相似文献