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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=2462441
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200007 22 49.3749762914 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-68 48 52.437987984 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195007 22 56.5587650075 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-68 42 58.357176929 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon280.1482011138174 deg Galactic longitude at Epoch=J1990, proper motions taken into account (pos.galactic.lon)
_Glat-22.4116846599553 deg Galactic latitude at Epoch=J1990, proper motions taken into account (pos.galactic.lat)
2462441recno 2462441  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IDTyc29179-749-1  (i) Tycho-2 identifier (TYC1-TYC2-TYC3) (id) (meta.id;meta.main)
HIP   (i) Hipparcos number (hip) (meta.id.cross)
TYC1 9179  TYC1 component from TYC or GSC (tyc1) (meta.id.part;meta.main)
TYC2 749  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)
TYC9179007491  Numeric Tycho-2 identifier ((tyc1*1000000)+(tyc2*10)+(tyc3)) (id_tycho) (meta.id;meta.dataset)
IDTyc1T  Tycho-1 star (tyc) (meta.code)
RAT110.70576750000 deg (i) Observed Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra) (pos.eq.ra;meta.main)
e_RAT 24.7 mas Uncertainty RA*cos(dec), of observed Tycho-2 RA (eradeg) (stat.error)
DET-68.81459833000 deg (i) Observed Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec) (pos.eq.dec;meta.main)
e_DET 23.3 mas Uncertainty of observed Tycho-2 Dec (ededeg) (stat.error)
RAmdeg110.70573511000 deg Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg) (pos.eq.ra)
e_RAmdeg 25.0 mas Uncertainty RA*cos(dec),at mean epoch (eramdeg) (stat.error)
DEmdeg-68.81457171000 deg Mean Declination (ICRS) at Ep=J2000 (de_mdeg) (pos.eq.dec)
e_DEmdeg 23.0 mas Uncertainty of Dec at mean epoch (edemdeg) (stat.error)
pmRA -5.0 mas/yr (i) Proper motion in right ascension, pmRA*cos(DE) (pm_ra) (pos.pm;pos.eq.ra)
e_pmRA 3.1 mas/yr Uncertainty proper motion in RA*cos(dec) (epmra) (stat.error;pos.pm;pos.eq.ra)
pmDE 11.6 mas/yr (i) Proper motion in Declination (pm_de) (pos.pm;pos.eq.dec)
e_pmDE 2.9 mas/yr Uncertainty of proper motion in Dec (epmde) (stat.error;pos.pm;pos.eq.dec)
EpRA1990 1.66 yr Epoch-1990 of RAdeg (ep_ra1990) (time.epoch)
EpDE1990 1.70 yr Epoch-1990 of DEdeg (ep_de1990) (time.epoch)
EpRAmdeg1990.78 yr Mean epoch of RAmdeg (epram) (time.epoch)
EpDEmdeg1990.86 yr Mean epoch of DEmdeg (epdem) (time.epoch)
Num 3   Number of positions used for forming mean data (num) (meta.number)
Corr 0.1   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 0.0   Goodness of fit for mean DE (qdemdeg) (meta.code.qual)
q_pmDE 0.1   Goodness of fit for pmDe (qpmde) (meta.code.qual)
q_pmRA 1.0   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)
BTmag10.806 mag Tycho-2 BT magnitude (bt_mag) (phot.mag;em.opt.B)
e_BTmag 0.038 mag Uncertainty of BTmag (ebtmag) (stat.error)
VTmag10.528 mag Tycho-2 VT magnitude (vt_mag) (phot.mag;em.opt.V)
e_VTmag 0.040 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.icrs110.70572906788 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-68.81456610777 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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