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J/A+A/428/149/table1 Hipparcos parallaxes of O stars (Schroeder+, 2004)
Characteristics of the O star sample. (154 rows)
  recno=104
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ColumnValue  Explain   (UCD)
_RAJ200016 37 09.5378 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000-10 34 01.524 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195016 34 24.1774 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950-10 28 01.525 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon006.2812247 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+23.5877429 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
104recno 104  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HD149757  HD number (meta.id;meta.main)
SpTypeO9.5Vn  MK spectral type (src.spType)
r_SpType9  Reference for SpType, when not Mason et al., 1998AJ....115..821M (meta.bib)
plx 7.12 mas Hipparcos parallax, corrected for interstellar extinction (AV) (pos.parallax)
e_plx 0.71 mas rms uncertainty on plx (stat.error;pos.parallax)
AV 1.06 mag Interstellar extinction (phys.absorption)
VMAGH -4.3 mag Hipparcos absolute magnitude (phys.magAbs)
VMAGSK-4.3 mag Predicted absolute magnitude, derived from the spectral type according to the calibration of Schmidt-Kaler et al. (Note G1)   (phys.magAbs)

HIPHIP  Show the Hipparcos data (meta.ref.url)
SimbadSimbad  ask the Simbad data-base about this object
_RA249.28974 deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
_DE-10.56709 deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  
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