Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 237

Author(s): Schwan, H.
Title: Completion of the FK5 Extension and a Preliminary Investigation of the FK5 System
Source: In: Developments in Astrometry and Their Impact on Astrophysics and Geodynamics. Proc. IAU Symp. 156, Shanghai, China, 15-19 September 1992; I.I. Mueller, B. Kolaczek (eds.), Kluwer, Dordrecht, p. 339-350
Year: 1993
Abstract: The construction of the Fifth Fundamental Catalogue (FK5) is shortly described with emphasis on the system of the Basic FK5 and on the completion of the FK5 Extension. New observations have revealed systematic errors mainly in the declination system of the FK5 and in the right ascensions south of -50 degrees. Comparisons of the new observations with the Basic FK5 and the FK5 Extension (made separately for the bright and faint stars) have shown that the FK5 Extension is essentially on the system of the Basic FK5.
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