THE TYCHO-REFERENCE-CATALOG

Authors
HOG E KUZMIN A BASTIAN U FABRICIUS C KUIMOV K LINDEGREN L MAKAROV VV ROSER S
Citation
E. Hog et al., THE TYCHO-REFERENCE-CATALOG, Astronomy and astrophysics (Berlin), 335(3), 1998, pp. 65-68
Citations number
17
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics (Berlin) → ACNP
ISSN journal
00046361
Volume
335
Issue
3
Year of publication
1998
Pages
65 - 68
Database
ISI
SICI code
0004-6361(1998)335:3<65:>2.0.ZU;2-0
Abstract
The Tycho Reference Catalogue (TRC) contains high-quality positions an d proper motions for 990182 stars of the Tycho Catalogue. The proper m otions were derived from Tycho positions and Astrographic Catalogue po sitions reduced to the Hipparcos system. The median accuracy of the TR C position components is 40 mas at J1991.25. The median precision of t he proper motion is about 2.5 mas/yr. Systematic errors are less than about 1.0 mas(/yr). The quality of the proper motions Catalogues. Comp arison with the recent ACT Catalogue which is based on an independent reduction of the same observations PPM as used for the TRC is reported .