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I/350/tyc2tdsc Gaia EDR3 (Gaia Collaboration, 2020)
Tycho-2 merged with the TDSC catalog and TDSC supplement (2561887 rows)
  recno=391767
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200023 07 28.7281191582 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+21 08 03.228990937 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195023 05 00.5391666112 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+20 51 50.971382391 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon 92.7640175797954 deg Galactic longitude at Epoch=J1990, proper motions taken into account (pos.galactic.lon)
_Glat-35.5748929008859 deg Galactic latitude at Epoch=J1990, proper motions taken into account (pos.galactic.lat)
391767recno 391767  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IDTyc21718-2350-1  (i) Tycho-2 identifier (TYC1-TYC2-TYC3) (id) (meta.id;meta.main)
HIP114189  (i) Hipparcos number (hip) (meta.id.cross)
TYC1 1718  TYC1 component from TYC or GSC (tyc1) (meta.id.part;meta.main)
TYC2 2350  TYC2 component from TYC or GSC (tyc2) (meta.id.part;meta.main)
TYC3 1  TYC2 component from TYC or GSC (tyc3) (meta.id.part;meta.main)
TYC1718023501  Numeric Tycho-2 identifier ((tyc1*1000000)+(tyc2*10)+(tyc3)) (id_tycho) (meta.id;meta.dataset)
IDTyc1T  Tycho-1 star (tyc) (meta.code)
RAT346.86938333000 deg (i) Observed Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra) (pos.eq.ra;meta.main)
e_RAT 3.9 mas Uncertainty RA*cos(dec), of observed Tycho-2 RA (eradeg) (stat.error)
DET+21.13436722000 deg (i) Observed Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec) (pos.eq.dec;meta.main)
e_DET 4.6 mas Uncertainty of observed Tycho-2 Dec (ededeg) (stat.error)
RAmdeg346.86964426000 deg Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg) (pos.eq.ra)
e_RAmdeg 4.0 mas Uncertainty RA*cos(dec),at mean epoch (eramdeg) (stat.error)
DEmdeg+21.13425287000 deg Mean Declination (ICRS) at Ep=J2000 (de_mdeg) (pos.eq.dec)
e_DEmdeg 5.0 mas Uncertainty of Dec at mean epoch (edemdeg) (stat.error)
pmRA 106.5 mas/yr (i) Proper motion in right ascension, pmRA*cos(DE) (pm_ra) (pos.pm;pos.eq.ra)
e_pmRA 1.1 mas/yr Uncertainty proper motion in RA*cos(dec) (epmra) (stat.error;pos.pm;pos.eq.ra)
pmDE -49.3 mas/yr (i) Proper motion in Declination (pm_de) (pos.pm;pos.eq.dec)
e_pmDE 1.0 mas/yr Uncertainty of proper motion in Dec (epmde) (stat.error;pos.pm;pos.eq.dec)
EpRA1990 1.77 yr Epoch-1990 of RAdeg (ep_ra1990) (time.epoch)
EpDE1990 1.66 yr Epoch-1990 of DEdeg (ep_de1990) (time.epoch)
EpRAmdeg1991.57 yr Mean epoch of RAmdeg (epram) (time.epoch)
EpDEmdeg1991.31 yr Mean epoch of DEmdeg (epdem) (time.epoch)
Num15   Number of positions used for forming mean data (num) (meta.number)
Corr 0.0   Correlation (RAdeg,DEdeg) (corr) (stat.correlation;pos.eq.ra;pos.eq.dec)
q_RAmdeg 0.5   Goodness of fit for mean RA (qramdeg) (meta.code.qual)
q_DEmdeg 0.8   Goodness of fit for mean DE (qdemdeg) (meta.code.qual)
q_pmDE 0.7   Goodness of fit for pmDe (qpmde) (meta.code.qual)
q_pmRA 0.5   Goodness of fit for pmRa (qpmra) (meta.code.qual)
pflag   Mean position flag (pflag) (meta.code)
posflg   Type of Tycho-2 solution (posflg) (meta.id;stat.fit)
CCDM   CCDM component identifier for HIP stars (ccdm) (meta.code.multip)
prox567   Proximity indicator (prox) (meta.code)
BTmag 6.263 mag Tycho-2 BT magnitude (bt_mag) (phot.mag;em.opt.B)
e_BTmag 0.015 mag Uncertainty of BTmag (ebtmag) (stat.error)
VTmag 5.985 mag Tycho-2 VT magnitude (vt_mag) (phot.mag;em.opt.V)
e_VTmag 0.010 mag Uncertainty of VTmag (evtmag) (stat.error)
TDSC   (i) TDSC identifier for the system (sys_no) (meta.id)
cmp   Component designation (cmp) (meta.id.part)
Nmain    Number of components in TDSC main catalogue (n_main) (meta.number)
Nsup    Number of components in the TDSC supplement (n_sup) (meta.number)
magflg   TDSC photometry flag (magflg) (meta.code)
WDS   (i) WDS identifier for the system (wds) (meta.id.cross)
Note   TDSC notes (note) (meta.note)
HD    HD identifier for TDSC entries (hd) (meta.id.cross)
rcmp   Reference component for position angle and separation (rcmp) (meta.id.assoc)
PA  deg Position angle of the present component (cmp) with respect to the reference component (rcmp) (pa) (pos.posAng)
e_PA  deg Uncertainty of the position angle (e_pa) (stat.error)
Sep  arcsec Separation of the present component (cmp) with respect to the reference component (rcmp) (sep) (pos.angDistance)
e_Sep  mas Uncertainty of the separation (e_sep) (stat.error)
e_PA.Sep    Uncertainty of the position angle * separation (epasep) (stat.error)

_RA.icrs346.86970049649 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+21.13423027526 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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