Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry. An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms
Note:
Note: please credit the usage of the UKIDSS data (details at http://www.ukidss.org/archive/archive.html)
Note: (see also the postcard server)
Note: The column expnum provides an access to details on the exposures, and a link to the Preview and Retrieval System via the CADC