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  B stars UBV and SpType catalogue (Hamdy+, 1993)
Post annotation
1.J/other/ApSS/203.53/table1A catalogue of spectral classification and photometric data of B-type stars (2047 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)
  Seq  (i) [1/2047] Sequential number (meta.record)
  HD  HD (Cat. III/135) number (
  SpType (char) MK Spectral type (src.spType)
  r_SpType  (n) [1/10] Reference for spectral type (Note 1)   (meta.ref;pos.frame)
  B-V mag Johnson B-V colour index (phot.color;em.opt.B;em.opt.V)
  U-B mag Johnson U-B colour index (phot.color;em.opt.U;em.opt.B)
  r_U-B  (n) [1/10] Reference for colours (Note 1)   (meta.ref;phot.color;em.opt.U)
  DQ mag Photometric quantity ΔQ (Note 2)   (phot.color;arith.diff)
  Simbad  ask the Simbad data-base about this object (meta.ref)
  _RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
  _DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)

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