USNO CCD Astrograph Catalog

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First USNO CCD Astrograph Catalog
Alternative names	UCAC
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The USNO CCD Astrograph Catalog (UCAC) is an astrometric star catalog of the United States Naval Observatory.

Edition	Description
UCAC-1	The first preliminary edition, published in March 2000, gives the positions and proper motions of over 27 million stars in the southern hemisphere in the brightness range 8–16.
UCAC-2	The second issue was the IAU published General Assembly in Sydney (2003) and includes positions and proper motions of about 50 million stars.
UCAC-3	The third edition was published in the IAU General Assembly in Rio (August 2009).
UCAC-4	The fourth edition was published in August 2012. Since Spring 2015, the successor URAT is available.
UCAC-5	The fifth edition was published in February 2017.

References

"UCAC5 - nowy katalog pozycji i ruchów własnych gwiazd" (in Polish). 2017-03-29.
UCAC5: New Proper Motions using Gaia DR1

External links

UCAC home page

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