Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 217

Author(s): Wielen, R.
Title: A Comprehensive Astrometric Data Base: An Instrument for Combining Earth-Bound Observations with HIPPARCOS Data
Source: In: Inertial Coordinate System on the Sky. Proc. IAU Symp. 141, Leningrad, USSR, 17-21 October 1989; J.H. Lieske, V.K. Abalakin (eds.), Kluwer, Dordrecht, p. 483-488
Year: 1990
Abstract: The astrometric data bank ARIGFH will contain all relevant astrometric data on stellar positions and proper motions of stars from ground-based observations and space missions. For each star in the ARIGFH, the best available position and proper motion shall be derived. We rediscuss the accuracy of proper motions and positions of fundamental stars, resulting from a combination of data in the FK5 with the expected results from a revised HIPPARCOS mission. The FK5 data could be significantly improved even by rather degraded positions from a revised HIPPARCOS mission.
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