Abstract
We have performed the first dynamical study of the relative motions of the components of the wide hierarchic triple star system ADS 10288 (GL 649.1 = WDS 16579+4722), based on a 15-year series of photographic observations with the 26″ Pulkovo refractor, supplemented with data from the WDS catalog, HIPPARCOS parallaxes, and radial velocities of the components. The radial velocities were measured in Simeiz using the ILS stellar radial-velocity correlation spectrometer designed by A.A. Tokovinin. We applied the parameters of the apparent motion technique, which makes it possible to derive a binary’s orbit and mass from observations of a short arc, about 5°–10° in length. We derived preliminary orbits for the pairs AB and (AB)-C, whose orbital periods are 340 and 64 000 years, respectively. Mass estimates derived from the mass-luminosity relation are consistent with our dynamical estimates. We determined the orientation of the orbits in Galactic coordinates. The orbital planes are not coplanar, and are steeply inclined to the Galactic plane, as was the case in our earlier studies for most wide visual pairs we have studied.
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Original Russian Text © A.A. Kiselev, L.G. Romanenko, N.A. Gorynya, 2009, published in Astronomicheskiĭ Zhurnal, 2009, Vol. 86, No. 12, pp. 1216–1226.
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Kiselev, A.A., Romanenko, L.G. & Gorynya, N.A. A dynamical study of the wide hierarchic triple star ADS 10288. Astron. Rep. 53, 1136–1145 (2009). https://doi.org/10.1134/S1063772909120063
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DOI: https://doi.org/10.1134/S1063772909120063