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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=186105
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ColumnValue  Explain   (UCD)
_RAJ200022 23 32.1520176 "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)
_DEJ2000-07 11 39.925536 "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 20 54.8198068 "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)
_DEB1950-07 26 52.209234 "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)
_Glon055.6591989715 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-49.6862413550 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)
186105recno 186105  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC15232  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 1730  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000335.88396674 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000-07.19442376 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 6.018 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 7.182 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypemc5  Source of spectral type (Note 2)   (meta.ref)
Namehd 212320  Alternate designation for star (Note 3)   (meta.id)
Dist 0.091 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 6.93 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)
LClass1   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 G8 Ib/II(w)  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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