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J/ApJS/155/175      MK Classification of Bright Star Supplement   (Abt, 2004)
Spectral classification of stars in a Supplement to the bright star catalogue.
    Abt H.A.
   <Astrophys. J. Suppl. Ser., 155, 175-177 (2004)>
   =2004ApJS..155..175A
ADC_Keywords: MK spectral classification

Keywords: stars: fundamental parameters


Description:
    MK  spectral types are given  for about 584 stars  in "A Supplement to
    the Bright Star Catalogue" (Hoffleit et al.,  1983,  Cat.  V/36).  The
    spectra  were obtained at Kitt Peak in 1983 on Eastman IIaO emulsions,
    15%  with  the Cassegrain spectrograph  on the 2.1m  telescope and the
    rest with a Cassegrain spectrograph on the 0.9m telescope.

    The spectral types are compared with Hipparcos parallaxes to check the
    reliability of those classifications. The estimated errors are ±1.2
    subtypes, and 10% of the luminosity classes may be wrong.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       145      584   Spectral Classification and Hipparcos Data


See also:
    V/36 : Supplement to the Bright Star Catalogue (Hoffleit+ 1983)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label   Explanations

   1-  6  I6    ---     HD      The HD designation number
   7-  8  A2    ---     m_HD    Multiplicity indicator
  10- 35  A26   ---     SpType  MK Spectral classification
  37- 40  F4.2  mag     Vmag    ? Apparent V band magnitude
  42- 47  F6.3  mag     B-V     ? The (B-V) color
  49- 53  F5.2  mas     plx     ? Parallax
  55- 59  F5.2  mag     VMag    ? Absolute V band magnitude
  61- 62  I2    h       RAh     Right Ascension J2000 (hours) (1)
  64- 65  I2    min     RAm     Right Ascension J2000 (minutes) (1)
  67- 71  F5.2  s       RAs     Right Ascension J2000 (seconds) (1)
      73  A1    ---     DE-     Declination J2000 (sign) (1)
  74- 75  I2    deg     DEd     Declination J2000 (degrees) (1)
  77- 78  I2    arcmin  DEm     Declination J2000 (minutes) (1)
  80- 83  F4.1  arcsec  DEs     Declination J2000 (seconds) (1)
      85  A1    ---     rPos    [T] Source of position (Tycho-2, Cat. I/259) (1)
  88-145  A58   ---     Notes   Note and Remarks by B. Skiff (1)

Note (1): Position and notes were added by B. Skiff.
    Notes include mainly the corrections performed compared to
    the original version, and remarks about binarity.


History:
    Notes and corrections kindly supplied by Brian Skiff
    in November 2004.
(End)               Greg Schwarz [AAS], Francois Ochsenbein [CDS]    15-Nov-2004