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TYCHO :The Tycho-2 Catalogue is an astrometric reference catalogue containing positions, proper motions and two-colour photometry for the 2.5 million brightest stars in the sky. The catalogue is based on observations made using the Hipparcos satellite

TYCHO/TYCHO.B_MvB4194.964220.394219.083543.205014.00741.393887.246.62e-9TYCHO TYCHO B, revised by Mann & von Braun 2014
TYCHO/TYCHO.B_bes4196.924221.094234.303520.835012.50686.373596.916.12e-9TYCHO TYCHO B, Bessell 2000 calibration
TYCHO/TYCHO.B4280.004280.004280.003535.794973.00708.433793.836.51e-9TYCHO TYCHO B
TYCHO/TYCHO.V5340.005340.005340.004572.646690.201005.673712.194.0e-9TYCHO TYCHO V
TYCHO/TYCHO.V_bes5301.295346.615260.324555.366708.331063.673745.013.99e-9TYCHO TYCHO V, Bessell 2000 calibration
TYCHO/TYCHO.V_MvB5300.195352.175258.484519.236769.201133.553692.283.94e-9TYCHO TYCHO V, revised by Mann & von Braun 2014

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