| Abstract: | A homogeneous series of photographic position measurments of the visual binary ADS 12815 obtained on the 26-inch refractor
of the Pulkovo Observatory (1960–2007) is analyzed. The Pulkovo observations allow for the existence of the planet around
component B discovered by Cochran et al. based on radial-velocity measurements. The orbit of the planet must be steeply inclined
to the plane of the sky (i ≥ 70°). Uniform series of position measurements obtained at the Dearborn Observatory, US Naval Observatory, and Pulkovo Observatory,
the HIPPARCOS parallax, and the relative radial velocities obtained by Hauser and Marcy at the Lick Observatory are used to
calculate the elements of possible orbits for the ADS 12815 stars using the apparent motion parameters method. The corresponding
periods are more than 20 000 yr, the semi-major axes more than 900 AU, and the eccentricities more than 0.65. All possible
orbits are steeply inclined to the Galactic plane. The obtained family of orbits is in better agreement with observations
than the family calculated by Hauser and Marcy. |
