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I/247
 The AC2000 Catalogue (Urban+ 1997)
This catalogue is obsoleted by I/275
Post annotation
img(gal)
1.I/247/ac2000 full AC J2000 catalog, split here into 14 files. (Note) (4621836 rows)
Detailed information can be found in intro.tex (see also http://aries.usno.navy.mil/ad/ac.html) 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 within the original table (starting from 1) (meta.record)
  RA(ICRS) "h:m:s" Right Ascension (ICRS) at Epoch (hours) (pos.eq.ra;meta.main)
  DE(ICRS) "d:m:s" Declination (ICRS) at Epoch (degrees) (pos.eq.dec;meta.main)
  Bmag mag Magnitude from image diameters (phot.mag;em.opt.B)
  Epoch yr Mean epoch of position (time.epoch)
  Num  Number of images used (meta.number)
  e_RAs arcsec (n)Standard deviation of mean, RA (stat.error)
  e_DEs arcsec (n)Standard deviation of mean, Dec (stat.error)
  AC2000  AC 2000 Number (meta.id;meta.main)
  HIP  (n)Hipparcos Number (Cat. I/239) (meta.id)
  TYC (char) Tycho ID (Cat. I/239) (Note)   (meta.id)
  ACRS  (n)ACRS number (Cat. I/171) (meta.id)
  Vflag  (n) [1] Verification Flag (Note)   (meta.note)

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