USNO CCD Astrograph Catalog
{{Multiple issues|{{more footnotes needed|date=October 2015}}{{more citations needed|date=October 2015}}}}
{{Infobox astronomical survey}}
The USNO CCD Astrograph Catalog (UCAC) is an astrometric star catalog of the United States Naval Observatory.
| class="wikitable"
! 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.{{cite web | url = http://www.urania.edu.pl/wiadomosci/ucac5-nowy-katalog-pozycji-ruchow-wlasnych-gwiazd-3220.html | title = UCAC5 - nowy katalog pozycji i ruchów własnych gwiazd | date = 2017-03-29 | language = pl}}[https://arxiv.org/abs/1702.05621 UCAC5: New Proper Motions using Gaia DR1] |
References
{{Reflist|30em}}
External links
- [https://web.archive.org/web/20090414135851/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/ucac UCAC home page]
Category:Astronomical catalogues of stars
{{astronomical-catalogue-stub}}