Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..119g&link_type=abstract
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he
Astronomy and Astrophysics
Astrophysics
Scientific paper
For the multiple system ADS 15571, it was calculated a preliminary orbit of visible secondary component (around primary) and periodic perturbations of its relative motion were investigated. ADS 15571 has been observed in the Pulkovo with 26″-refractor since 1960, it was observed for the first time in 1832 by O. Strueve. Treatment of astronegatives was made with scanner UMAX (resolution 1200 dpi, transparency adapter). The accuracy of annual average relative positions amounts to 0″,0048 in angular separation ρ and 0°,018 in positional angle θ. As known, the secondary component of visual double star ADS 15571 is spectroscopic binary with period of 1.1522 days (Sanford,1927). Study of more then 40-yrs set of photographic observations with 26″-refractor shows that system has more one component with period of 23 years. I obtained astrometric orbit of photocenter on base of apparent motion ellipse and concluded that detected periodic perturbations of relative motion caused by existence of low magnitude companion. Its minimum mass was estimated at 0.62 of Solar mass.
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