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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=182650
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ColumnValue  Explain   (UCD)
_RAJ200018 41 13.1616600 "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)
_DEJ2000-01 58 05.470968 "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)
_RAB195018 38 37.0830539 "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)
_DEB1950-02 00 59.149171 "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)
_Glon030.0146992464 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+01.3743528790 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)
182650recno 182650  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC15117  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 227  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000280.30484025 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000-01.96818638 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag10.717 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag11.092 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypek83  Source of spectral type (Note 2)   (meta.ref)
NameBD-02 4699  Alternate designation for star (Note 3)   (meta.id)
Dist 0.128 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag  mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_Mag*   [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)
LClass3   Luminosity class in numeric form (Note 7)   (src.spType)
Teff10100 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType A 0 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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