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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=47225
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ColumnValue  Explain   (UCD)
_RAJ200005 32 12.7516008 "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+18 35 39.253416 "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 29 16.7387222 "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+18 33 31.698776 "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)
_Glon187.1763815786 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-08.0725627793 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)
47225recno 47225  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC11301  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 707  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000083.05313167 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000+18.59423706 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 4.639 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 7.083 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypej64  Source of spectral type (Note 2)   (meta.ref)
Namehd 36389  Alternate designation for star (Note 3)   (meta.id)
Dist 0.046 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 4.70 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagX   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassM  Temperature class (Note 7)   (src.spType)
SClass2   Temperature Subclass (Note 7)   (src.spType)
LClass1   Luminosity class in numeric form (Note 7)   (src.spType)
Teff 3450 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType M2IAB  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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