The Tycho-2 Catalogue of the 2.5 Million Brightest Stars
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https://b2find.eudat.eu/dataset/e0ae0a4a-876c-52b6-8af6-3bc3efdf448f
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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...
