USNO-A2.0
By: [David Monet ... et al.].
Publisher: U.S. Naval Observatory
Published: 1998
Place of publication: Flagstaff, AZ
Language: eng
Format: [computer file] /
Number of pages: 11
Subjects: Stars; Catalogs; Databases; Astrometry
Other titles: USNO-A V2.0 :; USNO-A V2.0; U.S. Naval Observatory A-2.0 catalog
Description: A catalog of 526,280,881 stars, based on a re-reduction of the Precision Measuring Machine (PMM) scans that were the basis for the USNO-A1.0 catalog. A2.0 uses the ICRF as realized by the USNO ACT catalog, and presents right ascension and declination (J2000, epoch of the mean of the blue and red plate) and the blue and red magnitude for each star.
Notes: Title from disc label.

"September 1998."

Also available for ftp.