The Tycho-2 Catalogue is an astronomical catalogue of more than 2.5 million of the brightest stars. == Catalogue == The astrometric reference catalogue contain positions, proper motions, and two-color photometric data for 2,539,913 of the brightest stars in the Milky Way.
The Tycho-2 Catalogue is an astronomical catalogue of more than 2.5 million of the brightest stars. == Catalogue == The astrometric reference catalogue contain positions, proper motions, and two-color photometric data for 2,539,913 of the brightest stars in the Milky Way.
Source: Wikipedia "Tycho-2 Catalogue" · CC BY-SA 4.0
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