The Tycho-2 Catalogue of the 2.5 Million Brightest Stars
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https://b2find.eudat.eu/dataset/9278aaca-0b37-5ac4-90ae-2079b0ded8e1
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The Tycho-2 Catalogue is an astrometric reference catalogue containing positions and proper motions as well as two-colour photometric data for the 2.5 million brightest stars...
