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VizieR

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III/231/catalog The Tycho-2 Spectral Type Catalog (Wright+, 2003)
Main Catalog (351863 rows)
  recno=209391
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ColumnValue  Explain   (UCD)
_RAJ200006 49 40.1119152 "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)
_DEJ2000-15 02 40.481664 "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)
_RAB195006 47 23.8868102 "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)
_DEB1950-14 59 09.896956 "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)
_Glon226.1945023524 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-07.1804930338 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)
209391recno 209391  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC15950  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 204  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000102.41713298 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000-15.04457824 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 7.556 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 7.561 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypemc4  Source of spectral type (Note 2)   (meta.ref)
Namehd 49812  Alternate designation for star (Note 3)   (meta.id)
Dist 0.050 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 7.42 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagP   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassB  Temperature class (Note 7)   (src.spType)
SClass9   Temperature Subclass (Note 7)   (src.spType)
LClass5   Luminosity class in numeric form (Note 7)   (src.spType)
Teff10500 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType B9 V  Spectral Type (Note 1)   (src.spType)

Tycho-2Tycho-2  Display the Tycho-2 (II/259) data (meta.ref)
MKMK  Find out all spectral classifications in the neighbourhood of this position (meta.ref)
SimbadSimbad  ask the Simbad data-base about this object (meta.ref)
  
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