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J/AJ/137/4186
 UBVRI standards around celestial equator (Landolt, 2009)
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1.J/AJ/137/4186/starsUBVRI photometry, accurate coordinates and proper motions of standard stars (tables 2 and 5 of the paper) (595 rows)

 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  Name (char) Star name (meta.id;meta.main)
  Vmag mag The Johnson V band magnitude (phot.mag;em.opt.V)
  e_Vmag mag (n) Mean error of the mean of Vmag (stat.error;phot.mag;em.opt.V)
  B-V mag The Johnson (B-V) color index (phot.color;em.opt.B;em.opt.V)
  e_B-V mag (n) Mean error of the mean of B-V (stat.error;phot.color;em.opt.B)
  U-B mag The Johnson (U-B) color index (phot.color;em.opt.U;em.opt.B)
  e_U-B mag (n) Mean error of the mean of U-B (stat.error;phot.color;em.opt.U)
  V-R mag The Johnson-Cousins (V-R) color index (phot.color;em.opt.V;em.opt.R)
  e_V-R mag (n) Mean error of the mean of V-R (stat.error;phot.color;em.opt.V)
  R-I mag The Cousins (R-I) color index (phot.color;em.opt.R;em.opt.I)

ALL cols
    
(n) indicates a possible blank or NULL column  
  e_R-I mag (n) Mean error of the mean of R-I (stat.error;phot.color;em.opt.R)
  V-I mag The Johnson-Cousins (V-I) color index (phot.color;em.opt.V;em.opt.I)
  e_V-I mag (n) Mean error of the mean of V-I (stat.error;phot.color;em.opt.V)
  Nobs  Number of times star was observed (meta.number)
  Nnig  Number of nights star was observed (meta.number)
  RAJ2000 "h:m:s" Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" Degree of Declination (J2000) (pos.eq.dec;meta.main)
  UCAC2 (char) The UCAC2 identifier, Cat. I/289 (meta.id)
  2MASS-PSC (char) The 2MASS-PSC identifier, Cat. II/246 (meta.id)
  pmRA mas/yr Proper motion in Right Ascension (pos.pm;pos.eq.ra)
  pmDE mas/yr Proper motion in Declination (pos.pm;pos.eq.dec)
  Ref  Proper motion reference (Note 1)   (meta.ref;pos.pm;pos.frame)

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