Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 214

Author(s): Bastian, U.
Title: PPM: A Tool for Astronomers
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. 465-467
Year: 1990
Abstract: The new catalogue of Positions and Proper Motions ("PPM") was compiled to replace the AGK3 and SAO catalogues as an astrometric reference on the northern celestial hemisphere. It provides more than 180000 reference stars, is on the system of FK5 (J2000.0) and has a higher accuracy than the two older catalogues. Some properties of PPM and its High-Precision Subset are presented.
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