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VizieR

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J/AN/324/219/table1 Extinction of OB stars (Wegner, 2003)
Total-to-selective extinction ratios R and absolute magnitudes MV with their errors (597 rows)
  recno=298
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ColumnValue  Explain   (UCD)
_RAJ200016 47 19.6577 "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)
_DEJ2000-58 20 29.188 "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 43 03.4145 "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)
_DEB1950-58 15 07.754 "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)
_Glon329.9790459 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-08.4736321 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)
298recno 298  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

NameHD 150898  Star name (Note 1)   (meta.id;meta.main)
Vmag 5.57 mag V magnitude (phot.mag;em.opt.V)
SpTypeB0Ia  MK spectral type (src.spType)
r_SpType 1  References for SpType, in refs.dat file (meta.bib)
E(B-V) 0.160 mag Extinction in B-V (phot.color.excess)
r_E(B-V) 88  References for UBV data, in refs.dat file (meta.bib)
R 3.17  Total-to-selective extinction ratio, R=A(V)/E(B-V) (phys.absorption)
e_R 0.27  rms uncertainty on R (stat.error)
VMAG-3.8 mag Absolute V magnitude (phys.magAbs;em.opt.V)
e_VMAG 1.1 mag rms uncertainty on Vmag (stat.error)
u_VMAG   Uncertainty flag on Vmag (no rms uncertainty) (meta.code.error)
Rem   Remarks (meta.note)

SimbadSimbad  ask the Simbad data-base about this object
_RA251.83191 deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
_DE-58.34144 deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  
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