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VizieR

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II/187A/photo 30 Doradus OB Associations (Parker 1992)
Positional and photometric data (tables 4 and 5) (2395 rows)
  Num=266
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ColumnValue  Explain   (UCD)
_RAJ200005 38 31.71700 "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)
_DEJ2000-69 05 17.8500 "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)
_RAB195005 38 52.20639 "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)
_DEB1950-69 06 50.9550 "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)
_Glon279.45252755 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-31.68910438 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)
266recno 266  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Num 266  (i) [1/9045] Running number ([P93] in Simbad) (meta.id;meta.main)

n_Num    S indicates that spectroscopic data are available for this star (meta.ref.url)

RAJ200005 38 31.717 "h:m:s" (i) Right ascension J2000 (Note 1)   (pos.eq.ra;meta.main)
DEJ2000-69 05 17.85 "d:m:s" (i) Declination J2000 (Note 1)   (pos.eq.dec;meta.main)
Xpos281.28 pix X position (Note 2)   (pos.cartesian.x;instr.det)
Ypos 124.56 pix Y position (Note 2)   (pos.cartesian.y;instr.det)
Vmag17.791 mag V magnitude, in Johnson system (phot.mag;em.opt.V)
e_Vmag 0.089 mag Vmag accuracy (stat.error;phot.mag;em.opt.V)
B-V 0.300 mag B-V color, in Johnson system (phot.color;em.opt.B;em.opt.V)
e_B-V 0.113 mag B-V accuracy (stat.error;phot.color;em.opt.B)
U-B-0.690 mag U-B color, in Johnson system (Note 3)   (phot.color;em.opt.U;em.opt.B)
e_U-B 0.109 mag U-B accuracy (stat.error;phot.color;em.opt.U)
II/187A/spectro 30 Doradus OB Associations (Parker 1992)
Spectroscopic data (tables 11 and 12) (302 rows)
  Num=266
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