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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=187339
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ColumnValue  Explain   (UCD)
_RAJ200000 54 17.5933368 "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)
_DEJ2000-08 44 26.389068 "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)
_RAB195000 51 46.2193155 "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)
_DEB1950-09 00 41.799929 "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)
_Glon125.1676159502 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-71.6000166200 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)
187339recno 187339  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC15270  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 199  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000013.57330557 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000-08.74066363 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 6.264 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 7.321 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypemc5  Source of spectral type (Note 2)   (meta.ref)
Namehd 5268  Alternate designation for star (Note 3)   (meta.id)
Dist 0.415 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 7.08 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagP   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassG  Temperature class (Note 7)   (src.spType)
SClass8   Temperature Subclass (Note 7)   (src.spType)
LClass3   Luminosity class in numeric form (Note 7)   (src.spType)
Teff 4900 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType G8 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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