The Potsdam contribution to the extragalactic link of the HIPPARCOS pr oper motion system

Details The Potsdam contribution to the extragalactic link of the HIPPARCOS pr oper motion system The Potsdam contribution to the extragalactic link of the HIPPARCOS pr oper motion system

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..126...31h&link_type=abstract

A & A Supplement series, Vol. 126, November II 1997, 91-103.

Astronomy and Astrophysics

Astronomy

2

Astrometry, Methods: Statistical, Reference Systems, Catalogs, Stars: Kinematics

Scientific paper

Absolute proper motions of 360 Hipparcos stars in 24 fields well distributed over the northern sky were derived from measurements of photographic plates taken mainly with the Tautenburg Schmidt telescope (134/200/400 cm). In each field (about 10 square degrees) a large number of galaxies was used to link the proper motions to the extragalactic reference system. Because of systematic magnitude-dependent errors, which affect the proper motion determination of bright stars, only the 256 stars with B >= 9.0 were used to determine the spin parameters of the Hipparcos system. The accuracy of the final result is 0.5 mas/yr for all three spin parameters.

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