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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=204050
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ColumnValue  Explain   (UCD)
_RAJ200022 10 31.7700000 "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 49 13.432476 "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)
_RAB195022 07 51.9836818 "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)
_DEB1950-11 04 00.701881 "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)
_Glon048.3441591132 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-48.8525457606 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)
204050recno 204050  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC15806  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 285  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000332.63237500 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000-10.82039791 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 6.760 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 8.085 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypemc5  Source of spectral type (Note 2)   (meta.ref)
Namehd 210422  Alternate designation for star (Note 3)   (meta.id)
Dist 0.476 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 7.81 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagP   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassK  Temperature class (Note 7)   (src.spType)
SClass1   Temperature Subclass (Note 7)   (src.spType)
LClass3   Luminosity class in numeric form (Note 7)   (src.spType)
Teff 4600 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType K1 (III)  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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