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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 ( Exec{.show}{I/275}{0}{Detailed introduction}) (4621751 rows)
Exec.showI/2750Detailed introduction can be found in glutaggetCatFile I/275/intro.tex|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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usage  Display UCD1+    UCD1  
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