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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=102240
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ColumnValue  Explain   (UCD)
_RAJ200002 58 45.6715128 "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+39 39 45.824544 "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)
_RAB195002 55 33.3809302 "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+39 27 48.706050 "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)
_Glon148.0435146188 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-16.9208223240 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)
102240recno 102240  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC12850  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 2115  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000044.69029797 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000+39.66272904 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 4.690 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 4.765 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypej64  Source of spectral type (Note 2)   (meta.ref)
Namehd 18411  Alternate designation for star (Note 3)   (meta.id)
Dist 0.406 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 4.60 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagX   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassA  Temperature class (Note 7)   (src.spType)
SClass0   Temperature Subclass (Note 7)   (src.spType)
LClass5   Luminosity class in numeric form (Note 7)   (src.spType)
Teff 9520 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType A0V  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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