The Fifth US Naval Observatory CCD Astrograph Catalog (UCAC5)
Publish Time:2017-09-20
New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8–11 mag range as the reference star catalog. Significant improvements in the astrometric solutions were obtained, and the UCAC5 catalog of mean positions at a mean epoch near 2001 was generated. By combining UCAC5 with Gaia DR1 data, new proper motions were obtained for over 107 million stars on the Gaia coordinate system, with typical accuracies of 1–2 mas/yr (R=11–15 mag) and about 5 mas/yr at 16th mag. Proper motions of most TGAS stars are improved over their Gaia data and the precision level of TGAS proper motions is extended to many millions more, fainter stars. External comparisons were made using stellar cluster fields and extragalactic sources. The TGAS data allow us to derive the limiting precision of the UCAC x, y data, which is significantly better than 1/100 pixel.
· Data access ·
 
INTRODUCTION
Keywords
proper motion , astrometry , star
Data volume
5422.0000 MB 903 files
CONTACT AUTHOR
Author
UCAC group
Email
question(at)astro.u-strasbg.fr
CONTACT PUBLISHER
Email
support(at)china-vo.org
Phone
+86-10-64807973
Institution
National Astronomical Data Center
TAGS
waveband
Optical
telescope or project
US Naval Observatory CCD Astrograph Catalog(UCAC)
subject
Star and Interstellar Matter
data type
Catalog Data
Mirror Data
production age
1980-
content level
Research