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Tycho-2-katalogus

Die Tycho-2-katalogus is ’n astrometriese verwysingskatalogus van meer as 2,5 miljoen van die helderste sterre. Dit bevat die posisie, eiebeweging, en fotometriese data vir 2 539 913 van die helderste sterre in die Melkweg, waarvan sowat 5 000 met die blote oog sigbaar is. Dit is in 2000 gepubliseer.

Komponente van dubbelsterre met ’n afstand van mekaar van tot so min as 0,8 boogsekondes is ingesluit. Die katalogus dek 99% van sterre tot met ’n magnitude van 11 en 90% van sterre tot met ’n magnitude van 11,5.[1] Die inligting is tussen 1989 en 1993 versamel deur die Hipparcos-satelliet van die Europese Ruimteagentskap.

Tycho-2 is ’n hersiene en verbeterde uitgawe van Tycho-1, wat inligting oor sowat ’n miljoen sterre bevat het en in 1997 gepubliseer is. Die data in die tweede katalogus is ook noukeuriger.

Sien ook

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Verwysings

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  1. Høg, E.; Fabricius, C.; Makarov, V.V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 Catalogue of the 2.5 million brightest stars". Astronomy&Astrophysics. 355: L27..L30.

Eksterne skakels

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Tycho-2-katalogus
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