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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=54407
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ColumnValue  Explain   (UCD)
_RAJ200015 40 28.4466840 "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 40 17.642820 "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)
_RAB195015 38 13.2030668 "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 49 54.617844 "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)
_Glon029.8058842248 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+50.3541949325 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)
54407recno 54407  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC11498  First part of Tycho-2 identifier (meta.id.part;meta.main)
TYC2 1693  Second part of Tycho-2 identifier (meta.id.part;meta.main)
TYC31  Third part of Tycho-2 identifier (meta.id.part;meta.main)
RAJ2000235.11852785 deg (i) Right Ascension, J2000, decimal deg. (pos.eq.ra;meta.main)
DEJ2000+18.67156745 deg (i) Declination, J2000, decimal deg. (pos.eq.dec;meta.main)
VTmag 7.717 mag Tycho-2 VT magnitude (phot.mag;em.opt.V)
BTmag 7.979 mag Tycho-2 BT magnitude (phot.mag;em.opt.B)
r_SpTypeppN  Source of spectral type (Note 2)   (meta.ref)
Nameppm 131595  Alternate designation for star (Note 3)   (meta.id)
Dist 0.248 arcsec Distance between Tycho object and spectral type match (Note 4)   (pos.angDistance)
Mag 7.80 mag Magnitude from SpType catalog (Note 5)   (phot.mag)
f_MagP   [VPBX*] Flag indicating type of magnitude (Note 6)   (meta.code.error)
TClassA  Temperature class (Note 7)   (src.spType)
SClass2   Temperature Subclass (Note 7)   (src.spType)
LClass    Luminosity class in numeric form (Note 7)   (src.spType)
Teff 8970 K Effective temperature of the star, based on spectral type (Note G1)   (phys.temperature.effective)
SpType A2  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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