The use of observations remote in time to refine the orbit of a visual binary obtained by the method of parameters of the apparent motion along a short arc

Astronomy and Astrophysics – Astronomy

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Astrometry, Binary Stars, Orbital Elements, Stellar Motions, Celestial Mechanics, Orbital Mechanics, Radial Velocity, Secular Variations, Stellar Mass, Stellar Parallax

Scientific paper

The AMP method of obtaining a visual double star orbit yields two orbits satisfying the initial data when applied to a short arc. The method is proposed and investigated using individual old observations to choose the single solution and to estimate the value of the sum of component masses and the relative radial velocity. The orbit of the star ADS 9031, obtained by the new method from the 17-year series of observations, coincides well with the orbit obtained by Strand. The new orbit of the star 61 Cyg, determined from the 16-year series of observations, is calculated. It satisfies all the observations of the years 1834 - 1974.

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