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 The AC 2000.2 Catalogue (Urban+ 2001)
Post annotation
1.I/275/ac2002All 4,621,751 stars from the AC2000.2 Catalogue (Detailed introduction) (4621751 rows)
Detailed introduction can be found in intro.tex (see also Direct links to Hipparcos and Tycho observations are provided from the relevant columns.

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)
  RA(ICRS) "h:m:s" R.A. (hours), HCRS, at epoch mEp (pos.eq.ra;meta.main)
  DE(ICRS) "d:m:s" Decl. (degrees), HCRS, at epoch mEp (pos.eq.dec;meta.main)
  Bmag mag Observed B magnitude (Note)   (phot.mag;em.opt.B)
  mEp yr Mean epoch of position (time.epoch)
  Num  Number of images used for astrometry (meta.number)
  e_RAs arcsec (n) Standard deviation of Right Ascension (Note)   (stat.error)
  e_DEs arcsec (n) Standard deviation of Declination (Note)   (stat.error)
  ACnum  USNO generated identifier (;meta.main)
  HIP  (n) Hipparcos number (Note)   (
  m_HIP (char) Hipparcos component identifier (Note)   (meta.code.multip)
  TYC2 (char) Tycho-2 identifier (Note)   (
  Vmag mag (n) V magnitude (Note)   (phot.mag;em.opt.V)
  magflg  (n) [1,3] Magnitude warning flag (Note)   (meta.code)
  verflg  (n) [1] Verification flag (Note)   (meta.code)

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