Catalog Selection Page
Looking for catalogs ..
Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame.Service) or Position:

Target dimension:

Radius Box size

  UCAC4 Catalogue (Zacharias+, 2012)
Post annotation
1.I/322A/outFourth U.S. Naval Observatory CCD Astrograph Catalog (113780093 rows)
see the UCAC4 document, and the the fix for high proper motion stars. The UCAC home page is available at
Please acknowledge the usage of the UCAC4

Query by Constraints constraints help applied on Columns (Output Order: + - )
Standard Original
ShowSortColumn  Constraint Explain   (UCD)
  UCAC4 (char) (n)(i) UCAC4 recommended identifier (ZZZ-NNNNNN) (Note 1)   (;meta.main)
  RAJ2000 deg (i) Mean right ascension (ICRS), Ep=J2000 (Note 2)   (pos.eq.ra;meta.main)
  e_RAJ2000 mas Mean error of RAdeg at mean epoch (stat.error;pos.eq.ra)
  DEJ2000 deg (i) Mean declination (ICRS), Ep=J2000 (Note 2)   (pos.eq.dec;meta.main)
  e_DEJ2000 mas Mean error of DEdeg at mean epoch (stat.error;pos.eq.dec)
  ePos mas Total mean error on position at Ep=J2000 (Note 3)   (stat.error;pos)
  EpRA yr Central epoch for mean RA (time.epoch)
  EpDE yr Central epoch for mean Declination (time.epoch)
  f.mag mag (n) UCAC fit model magnitude (579-642nm) (Note 4)   (phot.mag;em.opt)
  a.mag mag (n) UCAC aperture magnitude (579-642nm) (Note 4)   (phot.mag;em.opt)
  e_a.mag mag (n) Mean error on f.mag and a.mag (Note 5)   (stat.error)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
  of   [0/9] UCAC4 object classification flag (Note 6)   (meta.code)
  db   [0/36] UCAC4 double star flag (Note 7)   (meta.code)
  Na   [0/71] Number of UCAC observations for the star (meta.number)
  Nu   [0/70] Number of used UCAC observations (Note 8)   (meta.number)
  Nc   [1/38] Number of catalog positions used for pm (meta.number)
  pmRA mas/yr (n) Proper motion in RA(*cos(Dec)) (Note 9)   (;pos.eq.ra)
  e_pmRA mas/yr (n) Mean error on pmRA (Note 9)   (stat.error;;pos.eq.ra)
  pmDE mas/yr (n) Proper motion in Dec (Note 9)   (;pos.eq.dec)
  e_pmDE mas/yr (n) Mean error on pmDE (Note 9)   (stat.error;;pos.eq.dec)
  MPOS1   [1/182895114] Unique star ID number (Note 10)   (