VizieR

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VizieR

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I/259/tyc2 The Tycho-2 Catalogue (Hog+ 2000)
*The Tycho-2 main catalogue (2539913 rows)
  recno=1918333
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ColumnValue  Explain   (UCD)
_RAJ200009 13 54.2450331 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-42 10 41.730812 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195009 12 00.7082217 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-41 58 14.496418 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon265.7556885411 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 4.4689721967 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)
1918333recno 1918333  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC17686  (i) [1,9537] TYC1 from TYC or GSC (Note 1)   (meta.id.part;meta.main)
TYC2 2798  (i) [1,12121] TYC2 from TYC or GSC (Note 1)   (meta.id.part;meta.main)
TYC31  (i) [1,3] TYC3 from TYC (Note 1)   (meta.id.part;meta.main)
pflag    [ PX] mean position flag (Note 2)   (meta.code)
RAmdeg138.47602059 deg []? Mean Right Asc, ICRS, epoch=J2000 (3) (Note 3)   (pos.eq.ra)
DEmdeg-42.17825849 deg []? Mean Decl, ICRS, at epoch=J2000 (3) (Note 3)   (pos.eq.dec)
pmRA -5.3 mas/yr [-4418.0,6544.2] prop. mot. in RA*cos(dec) (Note)   (pos.pm;pos.eq.ra)
pmDE 10.0 mas/yr [-5774.3,10277.3] prop. mot. in Dec (Note)   (pos.pm;pos.eq.dec)
e_RAmdeg117 mas [3,183] s.e. RA*cos(dec),at mean epoch (Note 5)   (stat.error)
e_DEmdeg114 mas [1,184] s.e. of Dec at mean epoch (Note 5)   (stat.error)
e_pmRA 2.7 mas/yr [0.2,11.5] s.e. prop mot in RA*cos(dec) (Note 5)   (stat.error)
e_pmDE 2.5 mas/yr [0.2,10.3] s.e. of proper motion in Dec (Note 5)   (stat.error)
EpRAm1961.13 yr [1915.95,1992.53] mean epoch of RA (Note 4)   (time.epoch)
EpDEm1956.32 yr [1911.94,1992.01] mean epoch of Dec (Note 4)   (time.epoch)
Num 3   [2,36] Number of positions used (meta.id)
q_RAmdeg 2.1   [0.0,9.9] Goodness of fit for mean RA (Note 6)   (meta.code.qual)
q_DEmdeg 2.4   [0.0,9.9] Goodness of fit for mean Dec (Note 6)   (meta.code.qual)
q_pmRA 2.1   [0.0,9.9] Goodness of fit for pmRA (Note 6)   (meta.code.qual)
q_pmDE 2.4   [0.0,9.9] Goodness of fit for pmDE (Note 6)   (meta.code.qual)
BTmag12.841 mag [2.183,16.581] Tycho-2 BT magnitude (Note 7)   (phot.mag;em.opt.B)
e_BTmag 0.226 mag [0.014,1.977] s.e. of BT (Note 7)   (stat.error)
VTmag12.098 mag [1.905,15.193] Tycho-2 VT magnitude (Note 7)   (phot.mag;em.opt.V)
e_VTmag 0.166 mag [0.009,1.468] s.e. of VT (Note 7)   (stat.error)
prox999   [3,999] proximity indicator (Note 8)   (meta.code)
TYC    [T] Tycho-1 star (Note 9)   (meta.code)
HIP    [1,120404] Hipparcos number (meta.id)
CCDM   CCDM component identifier for HIP stars (Note 10)   (meta.code.multip)
RA(ICRS)138.47603750 deg (i) Observed Tycho-2 Right Ascension, ICRS (pos.eq.ra;meta.main)
DE(ICRS)-42.17828167 deg (i) Observed Tycho-2 Declination, ICRS (pos.eq.dec;meta.main)
EpRA-1990 1.68 yr [0.81,2.13] epoch-1990 of RAdeg (time.epoch)
EpDE-1990 1.61 yr [0.72,2.36] epoch-1990 of DEdeg (time.epoch)
e_RAdeg143.4 mas s.e.RA*cos(dec), of observed Tycho-2 RA (Note 5)   (stat.error)
e_DEdeg145.2 mas s.e. of observed Tycho-2 Dec (Note 5)   (stat.error)
posflg    [ DP] type of Tycho-2 solution (Note 11)   (meta.id;stat.fit)
corr 0.0   [-1,1] correlation (RAdeg,DEdeg) (stat.correlation)
  
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