Photocentric orbits from a direct combination of ground-based astrometry with Hipparcos I. Comparison with known orbits

  • G. A. Gontcharov
  • Published 2002


Complementing the Proper Motions of Fundamental Stars catalogue by Gontcharov et al. (CDS, I–266) the photocentric orbits of some FK5/Hipparcos stars are calculated in a direct combination of the Hipparcos data with astrometric ground-based observational catalogues having epochs later than 1939. Some capabilities and limitations of this method are discussed… (More)


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