Optical/infrared image and catalog products provided by the USNO. Astrometric catalogs include NOMAD, UCAC, USNO-B1, Double Stars, etc. Imaging products include digital scans of a number of the major Schmidt telescope surveys of the skies, along with the catalogs of astronomical objects created from those images.
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The primary aim of NOMAD is to help users retrieve the best currently available astrometric data for any star in the sky by providing these data in one place.
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An all-sky astrometric survey for stars in the 7-16 magnitude range. Positions to accuracies of from 20-70 mas. Including proper motions. Approximate magnitudes in a non-standard bandpass (579-643 nm). UCAC4 was released in August 2012. It is available from CDS as Vizier catalog I/322; DVDs have been shipped to all customers on file. UPDATE Jan 2013: corrections for 3416 high proper motion stars.
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Our latest observational program was designed as the successor to UCAC. This all-sky astrometric survey covered the R=9-17.5 magnitude range and utilized the large field-of-view that the USNO 20cm "red lens" was designed for, covering 28 square degrees per exposure. The all-sky survey began at NOFS (Arizona), then continued from CTIO (Chile). A poster paper describing the progress of URAT was presented at the April 2014 DDA meeting in Philadelphia.
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USNO-B1.0 is the latest catalog from the USNO Precision Measuring Machine project. It contains over 1,000,000,000 entries and provides positions, magnitudes, and proper motions for each object.
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The double star catalogs maintained at the USNO, the Double Star Library (IAU Commission 26 webpage), and FAQ.
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Astrometric data for objects within our solar system including planetary satellites and minor planets.
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The USNO Image and Catalog Archive Server serves as the source of major USNO astrometric catalogs including the NOMAD, USNO-B1.0 and USNO-A2.0 catalogs. In addition, it contains digital scans of a number of the major Schmidt telescope surveys of the skies, along with the catalogs of astronomical objects created from those images.