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  The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)
Post annotation
1.I/254/outThe Full Catalogue (25241730 positions) (25241730 rows)
The Guide Star Catalog has been constructed to support the operational need of the Hubble Space Telescope. It contains over 25 million positions for about 19 million objects, of which more than 15 million are classified as stars. The version 1.2 is a new astrometric reduction which results in absolute position errors about 0.3-0.4 arcsec. (see GSC pages at URL

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  GSC  (i) GSC designation (Note)   (;meta.main)
  RAJ2000 deg (i) Right ascension in J2000, epoch of plate (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination in J2000, epoch of plate (pos.eq.dec;meta.main)
  PosErr arcsec Mean error on position (stat.error)
  Pmag mag (i) photographic magnitude (see n_Pmag) (phot.mag;em.opt)
  e_Pmag mag Mean error on photographic magnitude (stat.error;phot.mag;em.opt.U)
  n_Pmag   [0,18] Coded passband for magnitude (Note)   (meta.note)
  Class   [0,3] Class of object (0=star; 3=non-stellar) (src.class)
  Plate (char) Plate designation (Note)   (obs.field)
  Epoch yr (n) Epoch of plate (Note)   (time.epoch)
  Mult (char) [TF] True if multiple object / False otherwise (meta.code.multip)
  Versions  Get parameters of that star from all GSC versions (meta.ref.url)

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