| I/350/tyc2tdsc | Gaia EDR3 (Gaia Collaboration, 2020) Tycho-2 merged with the TDSC catalog and TDSC supplement (2561887 rows) | recno=646112 |
| Column | Value | Explain (UCD) | |
| _RAJ2000 | 20 37 57.0837866972 | "h:m:s" | Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra) |
| _DEJ2000 | +31 07 14.422999999 | "d:m:s" | Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec) |
| _RAB1950 | 20 35 54.4511135805 | "h:m:s" | Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra) |
| _DEB1950 | +30 56 40.710079682 | "d:m:s" | Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec) |
| _Glon | 72.6140508097035 | deg | Galactic longitude at Epoch=J1990, proper motions taken into account (pos.galactic.lon) |
| _Glat | -6.0740650782937 | deg | Galactic latitude at Epoch=J1990, proper motions taken into account (pos.galactic.lat) |
| 646112recno | 646112 | Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) | |
| IDTyc2 | 2686-1345-1 | (i) Tycho-2 identifier (TYC1-TYC2-TYC3) (id) (meta.id;meta.main) | |
| HIP | (i) Hipparcos number (hip) (meta.id.cross) | ||
| TYC1 | 2686 | TYC1 component from TYC or GSC (tyc1) (meta.id.part;meta.main) | |
| TYC2 | 1345 | 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) | |
| TYC | 2686013451 | Numeric Tycho-2 identifier ((tyc1*1000000)+(tyc2*10)+(tyc3)) (id_tycho) (meta.id;meta.dataset) | |
| IDTyc1 | Tycho-1 star (tyc) (meta.code) | ||
| RAT | 309.48785917000 | deg | (i) Observed Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra) (pos.eq.ra;meta.main) |
| e_RAT | 85.7 | mas | Uncertainty RA*cos(dec), of observed Tycho-2 RA (eradeg) (stat.error) |
| DET | +31.12068000000 | deg | (i) Observed Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec) (pos.eq.dec;meta.main) |
| e_DET | 72.5 | mas | Uncertainty of observed Tycho-2 Dec (ededeg) (stat.error) |
| RAmdeg | 309.48785092000 | deg | Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg) (pos.eq.ra) |
| e_RAmdeg | 83.0 | mas | Uncertainty RA*cos(dec),at mean epoch (eramdeg) (stat.error) |
| DEmdeg | +31.12067438000 | deg | Mean Declination (ICRS) at Ep=J2000 (de_mdeg) (pos.eq.dec) |
| e_DEmdeg | 71.0 | mas | Uncertainty of Dec at mean epoch (edemdeg) (stat.error) |
| pmRA | -3.1 | mas/yr | (i) Proper motion in right ascension, pmRA*cos(DE) (pm_ra) (pos.pm;pos.eq.ra) |
| e_pmRA | 3.8 | mas/yr | Uncertainty proper motion in RA*cos(dec) (epmra) (stat.error;pos.pm;pos.eq.ra) |
| pmDE | -2.5 | mas/yr | (i) Proper motion in Declination (pm_de) (pos.pm;pos.eq.dec) |
| e_pmDE | 3.6 | mas/yr | Uncertainty of proper motion in Dec (epmde) (stat.error;pos.pm;pos.eq.dec) |
| EpRA1990 | 1.64 | yr | Epoch-1990 of RAdeg (ep_ra1990) (time.epoch) |
| EpDE1990 | 1.78 | yr | Epoch-1990 of DEdeg (ep_de1990) (time.epoch) |
| EpRAmdeg | 1985.92 | yr | Mean epoch of RAmdeg (epram) (time.epoch) |
| EpDEmdeg | 1987.30 | yr | Mean epoch of DEmdeg (epdem) (time.epoch) |
| Num | 2 | 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 | Goodness of fit for mean RA (qramdeg) (meta.code.qual) | ||
| q_DEmdeg | Goodness of fit for mean DE (qdemdeg) (meta.code.qual) | ||
| q_pmDE | Goodness of fit for pmDe (qpmde) (meta.code.qual) | ||
| q_pmRA | 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) | ||
| prox | 704 | Proximity indicator (prox) (meta.code) | |
| BTmag | 12.860 | mag | Tycho-2 BT magnitude (bt_mag) (phot.mag;em.opt.B) |
| e_BTmag | 0.171 | mag | Uncertainty of BTmag (ebtmag) (stat.error) |
| VTmag | 12.229 | mag | Tycho-2 VT magnitude (vt_mag) (phot.mag;em.opt.V) |
| e_VTmag | 0.137 | 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 | 309.48784911124 | deg | (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra) |
| _DE.icrs | +31.12067305556 | deg | (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec) |
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