Tycho 2 catalog
The Tycho-2 catalog is a star catalog that was published in 2000. It was created on the basis of the database of the Hipparcos mission operated by ESA . It is a further development based on the database of the Tycho 1 catalog from 1997, which contained over 1 million stars.
The catalog contains positions and proper movements as well as photometric data from two color ranges for 2,539,913 of the brightest stars. The catalog is approximately 90% complete up to a magnitude of 11.5 and 99% complete up to a magnitude of 11. Double stars and multiple stars are resolved to an angle of 0.8 arc seconds.
The data from this catalog was included in the Tycho-Gaia Astrometric Solution (TGAS) for 2,057,050 objects, which were published together with data from the Gaia mission in the Gaia DR1 catalog. The proper movement is accurate to 1 milli-arcsecond (mas) per year, the positions and parallaxes to ± 0.3 mas.
The catalog does not contain any information on radial movement as Hipparcos did not have any instruments for this purpose.
Web links
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- ^ VizieR archives. Retrieved August 19, 2017 .