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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=1594966
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200000 58 36.3631225537 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-29 21 26.801983936 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195000 56 11.8893331119 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-29 37 38.280846106 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon268.0476479432028 deg Galactic longitude at Epoch=J1990, proper motions taken into account (pos.galactic.lon)
_Glat-87.2685499550547 deg Galactic latitude at Epoch=J1990, proper motions taken into account (pos.galactic.lat)
1594966recno 1594966  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IDTyc26424-2270-1  (i) Tycho-2 identifier (TYC1-TYC2-TYC3) (id) (meta.id;meta.main)
HIP 4577  (i) Hipparcos number (hip) (meta.id.cross)
TYC1 6424  TYC1 component from TYC or GSC (tyc1) (meta.id.part;meta.main)
TYC2 2270  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)
TYC6424022701  Numeric Tycho-2 identifier ((tyc1*1000000)+(tyc2*10)+(tyc3)) (id_tycho) (meta.id;meta.dataset)
IDTyc1T  Tycho-1 star (tyc) (meta.code)
RAT 14.65144417000 deg (i) Observed Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra) (pos.eq.ra;meta.main)
e_RAT 3.4 mas Uncertainty RA*cos(dec), of observed Tycho-2 RA (eradeg) (stat.error)
DET-29.35746194000 deg (i) Observed Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec) (pos.eq.dec;meta.main)
e_DET 3.4 mas Uncertainty of observed Tycho-2 Dec (ededeg) (stat.error)
RAmdeg 14.65150219000 deg Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg) (pos.eq.ra)
e_RAmdeg 3.0 mas Uncertainty RA*cos(dec),at mean epoch (eramdeg) (stat.error)
DEmdeg-29.35744807000 deg Mean Declination (ICRS) at Ep=J2000 (de_mdeg) (pos.eq.dec)
e_DEmdeg 3.0 mas Uncertainty of Dec at mean epoch (edemdeg) (stat.error)
pmRA 21.6 mas/yr (i) Proper motion in right ascension, pmRA*cos(DE) (pm_ra) (pos.pm;pos.eq.ra)
e_pmRA 0.6 mas/yr Uncertainty proper motion in RA*cos(dec) (epmra) (stat.error;pos.pm;pos.eq.ra)
pmDE 6.1 mas/yr (i) Proper motion in Declination (pm_de) (pos.pm;pos.eq.dec)
e_pmDE 0.5 mas/yr Uncertainty of proper motion in Dec (epmde) (stat.error;pos.pm;pos.eq.dec)
EpRA1990 1.58 yr Epoch-1990 of RAdeg (ep_ra1990) (time.epoch)
EpDE1990 1.67 yr Epoch-1990 of DEdeg (ep_de1990) (time.epoch)
EpRAmdeg1991.08 yr Mean epoch of RAmdeg (epram) (time.epoch)
EpDEmdeg1991.16 yr Mean epoch of DEmdeg (epdem) (time.epoch)
Num26   Number of positions used for forming mean data (num) (meta.number)
Corr-0.2   Correlation (RAdeg,DEdeg) (corr) (stat.correlation;pos.eq.ra;pos.eq.dec)
q_RAmdeg 1.0   Goodness of fit for mean RA (qramdeg) (meta.code.qual)
q_DEmdeg 1.0   Goodness of fit for mean DE (qdemdeg) (meta.code.qual)
q_pmDE 1.0   Goodness of fit for pmDe (qpmde) (meta.code.qual)
q_pmRA 0.8   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)
prox999   Proximity indicator (prox) (meta.code)
BTmag 4.110 mag Tycho-2 BT magnitude (bt_mag) (phot.mag;em.opt.B)
e_BTmag 0.014 mag Uncertainty of BTmag (ebtmag) (stat.error)
VTmag 4.274 mag Tycho-2 VT magnitude (vt_mag) (phot.mag;em.opt.V)
e_VTmag 0.009 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.icrs 14.65151301064 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-29.35744499554 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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