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 UCAC2 Catalogue (Zacharias+ 2004) See also the more recent versions UCAC3 (I/315) and UCAC4 (I/322)
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1.I/289/outThe Second U.S. Naval Observatory CCD Astrograph Catalog (48330571 rows)
More recent versions available: UCAC3 (I/315) and UCAC4 (I/322); see also the UCAC home page at

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  2UCAC   [00000001,48330571] UCAC designation (Note 1)   (;meta.main)
  RAJ2000 deg Right ascension (degrees), ICRS, Ep=J2000 (Note 2)   (pos.eq.ra;meta.main)
  e_RAJ2000 mas Minimal mean error on RAdeg (Note 3)   (stat.error;pos.eq.ra)
  DEJ2000 deg Declination (degrees), ICRS, Ep=J2000 (Note 2)   (pos.eq.dec;meta.main)
  e_DEJ2000 mas Minimal mean error on DEdeg (Note 3)   (stat.error;pos.eq.dec)
  ePos mas Error of original UCAC observation (Note 4)   (stat.error;obs.param;obs)
  UCmag mag Magnitude in UCAC system (579-642nm) (Note 5)   (phot.mag;em.opt)
  No  Number of UCAC observations for the star (meta.number)
  Nc  Number of catalog positions used for pmRA, pmDE (meta.number)
  cfl  Major catalogs used in pmRA, pmDE (Note 6)   (;meta.dataset)
  EpRA yr Central epoch for mean RA (Note 3)   (time.epoch)

ALL cols
  EpDE yr Central epoch for mean Declination (Note 3)   (time.epoch)
  pmRA mas/yr Proper motion in RA(*cos(Dec)) (Note 7)   (;pos.eq.ra)
  e_pmRA mas/yr Mean error on pmRA (Note 8)   (stat.error;;pos.eq.ra)
  pmDE mas/yr Proper motion in Dec (;pos.eq.dec)
  e_pmDE mas/yr Mean error on pmDE (Note 8)   (stat.error;;pos.eq.dec)
  qpmRA  Goodness of fit for pmRA (Note 8)   (
  qpmDE  Goodness of fit for pmDE (Note 8)   (
  2Mkey  2MASS (II/246) Unique source identifier (
  Jmag mag (n) J magnitude (1.2um) from 2MASS (phot.mag;em.IR.J)
  Hmag mag (n) H magnitude (1.6um) from 2MASS (phot.mag;em.IR.H)
  Kmag mag (n) K magnitude (2.2um) from 2MASS (phot.mag;em.IR.K)
  phf  2MASS photometric quality flag (Note 9)   (meta.code.qual;phot)
  ccf  2MASS confusion flag (Note 10)   (meta.code)

ALL cols
(n) indicates a possible blank or NULL column  
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