United States Naval Observatory Catalogs

Mission Characteristics

Lifetime: USNO-B1: Digitizations of photographic plates covering the years 1949-2002
UCAC: 1998-2004
URAT: 2012-present
Wavelength: USNO-B1: Optical B, R, and I bands (0.4-0.9 microns)
UCAC: 579-642nm
URAT: 670-750nm
Area Coverage: All-Sky
Science Products Generated: All-sky catalogs of photometry, positions, and derived proper motions
References: USNO-B1: Monet et al. (2003)
UCAC4: Zacharias et al. (2013)
UCAC5: Zacharias, Finch, & Frouard (2017)
URAT1: Zacharias et al. (2015)

IRSA Services

USNO-B1 Catalog Documentation Documentation for the USNO-B1 Catalog
USNO-B1 Catalog Search Use IRSA's General Catalog Search to search the catalog
UCAC4 Catalog Documentation Documentation for the UCAC4 Catalog
UCAC4 Catalog Column Descriptions Column Descriptions for the UCAC4 Catalog
UCAC4 Catalog Use IRSA's General Catalog Search to search the catalog
UCAC5 Catalog Documentation Documentation for the UCAC5 Catalog
UCAC5 Catalog Column Descriptions Column Descriptions for the UCAC5 Catalog
UCAC5 Catalog Use IRSA's General Catalog Search to search the catalog
URAT1 Catalog Documentation Documentation for the URAT1 Catalog
URAT1 Catalog Column Descriptions Column Descriptions for the URAT1 Catalog
URAT1 Catalog Use IRSA's General Catalog Search to search the catalog

Other Resources:

UNSO Optical/IR Products Project Website