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На этой странице приведены все страницы, которые ссылаются на http://www.stsci.edu/~inr/nstars2c.html. Показаны документы 1 - 1 из 1.
1. NStars2A: Proper motions - the NLTT and 2MASS
... The NLTT catalogue gives positions for equinox 1950. Those positions were precessed to equinox 2000, and proper motion corrections applied to epoch 1998 (approximately the midpoint of the 2MASS survey, at least for the data in the second incremental release). ... We cross-referenced the 2MASS NLTT dataset against the pCNS3 catalogue, taking the positions from that source and applying precession and proper motion corrections to give equinox and epoch 2000 positions. ... Salim Gould NLTT catalogue . ...
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Ссылки http://www.stsci.edu/~inr/nstars2a.html -- 29.1 Кб -- 08.06.2007
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