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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=158
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ColumnValue  Explain   (UCD)
_RAJ200007 06 35.9653 "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)
_DEJ2000-12 23 38.216 "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)
_RAB195007 04 16.2611 "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)
_DEB1950-12 18 56.016 "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)
_Glon225.6786125 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-02.3157311 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)
158recno 158  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

NameHD 53975  Star name (Note 1)   (meta.id;meta.main)
Vmag 6.45 mag V magnitude (phot.mag;em.opt.V)
SpTypeB7Iab  MK spectral type (src.spType)
r_SpType 1  References for SpType, in refs.dat file (meta.bib)
E(B-V) 0.185 mag Extinction in B-V (phot.color.excess)
r_E(B-V) 85  References for UBV data, in refs.dat file (meta.bib)
R 3.25  Total-to-selective extinction ratio, R=A(V)/E(B-V) (phys.absorption)
e_R 0.19  rms uncertainty on R (stat.error)
VMAG-4.2 mag Absolute V magnitude (phys.magAbs;em.opt.V)
e_VMAG 1.8 mag rms uncertainty on Vmag (stat.error)
u_VMAG   Uncertainty flag on Vmag (no rms uncertainty) (meta.code.error)
Rem m  Remarks (meta.note)

SimbadSimbad  ask the Simbad data-base about this object
_RA106.64986 deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)
_DE-12.39395 deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  
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