SIMBAD references

2004AJ....127.3043Z - Astron. J., 127, 3043-3059 (2004/May-0)

The second US Naval Observatory CCD astrograph catalog (UCAC2).

ZACHARIAS N., URBAN S.E., ZACHARIAS M.I., WYCOFF G.L., HALL D.M., MONET D.G. and RAFFERTY T.J.

Abstract (from CDS):

The second US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC2 was released in 2003 July. Positions and proper motions for 48,330,571 sources (mostly stars) are available on 3 CDs, supplemented with Two Micron All Sky Survey photometry for 99.5% of the sources. The catalog covers the sky area from -90° to +40° declination, going up to +52° in some areas; this completely supersedes the UCAC1 released in 2001. Current epoch positions are obtained from observations with the USNO 8 inch (0.2 m) Twin Astrograph equipped with a 4K CCD camera. The precision of the positions are 15-70 mas, depending on magnitude, with estimated systematic errors of 10 mas or below. Proper motions are derived by using over 140 ground- and space-based catalogs, including Hipparcos/Tycho and the AC2000.2, as well as yet unpublished remeasures of the AGK2 plates and scans from the NPM and SPM plates. Proper-motion errors are about 1-3 mas/yr for stars to 12th magnitude, and about 4-7 mas/yr for fainter stars to 16th magnitude. The observational data, astrometric reductions, results, and important information for the users of this catalog are presented.

Abstract Copyright:

Journal keyword(s): Astrometry - Catalogs - Methods: Data Analysis - Stars: Kinematics

VizieR on-line data: <CDS Catalogue: I/289>

Nomenclature: Catalog: UCAC2 NNNNNNNN N=48330571.

Simbad objects: 1

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2021.06.19-06:20:53

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