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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=71703
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ColumnValue  Explain   (UCD)
_RAJ200013 30 46.8038568 "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+24 13 57.762588 "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)
_RAB195013 28 24.5580960 "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+24 29 24.035014 "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)
_Glon017.0211001663 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+80.6784941884 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)
71703recno 71703  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC11997  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 553  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000202.69501607 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000+24.23271183 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 8.279 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 9.291 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypej64  Source of spectral type (Note 2)   (meta.ref)
Namehd 117555  Alternate designation for star (Note 3)   (meta.id)
Dist 0.487 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 8.00 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagX   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassG  Temperature class (Note 7)   (src.spType)
SClass2   Temperature Subclass (Note 7)   (src.spType)
LClass3   Luminosity class in numeric form (Note 7)   (src.spType)
Teff 5450 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType G2III  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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