The Tycho Reference Catalogue (Hog+ 1998)

Details The Tycho Reference Catalogue (Hog+ 1998) The Tycho Reference Catalogue (Hog+ 1998)

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat.1250....0h&link_type=abstract

VizieR On-line Data Catalog: I/250. Originally published in: 1998A&A...335L..65H

Astronomy and Astrophysics

Astronomy

Positional Data, Proper Motions, Astrographic Zones, Historical Catalog, Photographic Catalog, Surveys, Cross Identifications

Scientific paper

The Tycho Reference Catalogue (TRC) contains high-quality positions and proper motions for 990182 stars of the Tycho Catalogue. The proper motions were derived from Tycho positions and Astrographic Catalogue positions reduced to the Hipparcos system. The median accuracy of the TRC position components is 40 mas at J1991.25. The median accuracy of the proper motion is about 2.5 mas/yr. Systematic errors are less than about 1.0 mas(/yr). The quality of the proper motions in TRC is assessed by comparison with the Hipparcos and Tycho Catalogues. Comparison with the recent ACT Catalogue which is based on an independent reduction of the same observations as used for constructing the TRC is reported.
(2 data files).

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