USNO CCD Astrograph Catalog
The USNO CCD Astrograph Catalog (UCAC) is an astrometric star catalog of the United States Naval Observatory.
| Alternative names | UCAC |
|---|---|
| Survey type | star catalogue  |
| Published | October 2000 |
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.[1][2]
gollark: Get dragons.
gollark: 🤖🐟
gollark: 🐟💻🐟
gollark: I mean, generally speaking, any player can remove about 16-24 generic eggs from the cave per day and then dump them somewhere, with about 10 minutes of work. Obviously, if you want to gather nongeneric ones you either need more time or lower targets.
gollark: It'd be pointless.
References
- "UCAC5 - nowy katalog pozycji i ruchów własnych gwiazd" (in Polish). 2017-03-29.
- UCAC5: New Proper Motions using Gaia DR1
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