| I/337/tgas | Gaia DR1 (Gaia Collaboration, 2016) TGAS: Subset of GaiaSource comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release (TgasSource) (Download Tgas Sources as vo tables, fits or csv here) (original column names in green) (2057050 rows) | recno=689452 |
| Column | Value | Explain (UCD) | |
| _RAJ2000 | 21 28 14.930828546 | "h:m:s" | Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra) |
| _DEJ2000 | +70 39 25.12145635 | "d:m:s" | Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec) |
| _RAB1950 | 21 27 37.690042528 | "h:m:s" | Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra) |
| _DEB1950 | +70 26 15.61210540 | "d:m:s" | Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec) |
| _Glon | 107.584940554965 | deg | Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon) |
| _Glat | +14.118118436404 | deg | Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat) |
| 689452recno | 689452 | Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) | |
| hip | Hipparcos identifier (hip) (meta.id.cross) | ||
| tycho2_id | 4465-1306-1 | Tycho 2 identifier (tycho2_id) (meta.id.cross) | |
| solution_id | 1635378410781933568 | Solution ID (solution_id) (Note G1) (meta.id;meta.version) | |
| source_id | 2272200186786832384 | (i) Source ID (source_id) (Note G2) (meta.id;meta.main) | |
| random_index | 798699 | Random index used to select subsets (random_index) (Note G3) (meta.code) | |
| ref_epoch | 2015.0 | yr | [2015.0] Reference epoch in Julian years (ref_epoch) (Note G4) (meta.ref;time.epoch) |
| ra | 322.0621381947 | deg | (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main) |
| ra_error | 0.171 | mas | (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra) |
| dec | +70.6569847115 | deg | (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main) |
| dec_error | 0.168 | mas | (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec) |
| parallax | 2.14 | mas | (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax) |
| parallax_error | 0.25 | mas | (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax) |
| pmRA | -5.850 | mas/yr | (i) Proper motion in right ascension direction (pmRA) (Note G5) (pos.pm;pos.eq.ra) |
| pmra_error | 0.799 | mas/yr | (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra) |
| pmdec | 1.567 | mas/yr | (i) Proper motion in declination direction (pmdec) (Note G6) (pos.pm;pos.eq.dec) |
| pmdec_error | 0.492 | mas/yr | (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec) |
| ra_dec_corr | 0.682 | Correlation between right ascension and declination (ra_dec_corr) (stat.correlation) | |
| ra_parallax_corr | 0.734 | Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation) | |
| ra_pmra_corr | -0.828 | Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation) | |
| ra_pmdec_corr | -0.119 | Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation) | |
| dec_parallax_corr | 0.684 | Correlation between declination and parallax (dec_parallax_corr) (stat.correlation) | |
| dec_pmra_corr | -0.719 | Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation) | |
| dec_pmdec_corr | -0.203 | Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation) | |
| parallax_pmra_corr | -0.907 | Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation) | |
| parallax_pmdec_corr | 0.143 | Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation) | |
| pmra_pmdec_corr | -0.060 | Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation) | |
| astrometric_n_obs_al | 112 | Total number of observations AL (astrometric_n_obs_al) (Note G7) (meta.number) | |
| astrometric_n_obs_ac | 112 | Total number of observations AC (astrometric_n_obs_ac) (Note G8) (meta.number) | |
| astrometric_n_good_obs_al | 112 | Number of good observations AL (astrometric_n_good_obs_al) (Note G9) (meta.number) | |
| astrometric_n_good_obs_ac | 109 | Number of good observations AC (astrometric_n_good_obs_ac) (Note G9) (meta.number) | |
| astrometric_n_bad_obs_al | 0 | Number of bad observations AL (astrometric_n_bad_obs_al) (Note G10) (meta.number) | |
| astrometric_n_bad_obs_ac | 3 | Number of bad observations AC (astrometric_n_bad_obs_ac) (Note G10) (meta.number) | |
| astrometric_delta_q | Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only) (astrometric_delta_q) (Note G11) (stat.value) | ||
| astrometric_excess_noise | 0.30 | mas | Excess noise of the source (astrometric_excess_noise) (Note G12) (stat.value) |
| astrometric_excess_noise_sig | 1.4e+02 | Significance of excess noise (astrometric_excess_noise_sig) (Note G13) (stat.value) | |
| astrometric_primary_flag | 1 | [1] Primary or secondary (astrometric_primary_flag) (Note G14) (meta.code) | |
| astrometric_relegation_factor | 3.12 | Relegation factor (astrometric_relegation_factor) (arith.factor) | |
| astrometric_weight_al | 9.917 | mas-2 | Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean) |
| astrometric_weight_ac | 2.83e-05 | mas-2 | Mean astrometric weight of the source in the AC direction (astrometric_weight_ac) (stat.weight;stat.mean) |
| astrometric_priors_used | 5 | [3/5] Type of prior used in in the astrometric solution (astrometric_priors_used) (Note G15) (meta.code) | |
| matched_observations | 18 | Amount of observations matched to this source (matched_observations) (Note G16) (meta.number) | |
| duplicated_source | 0 | [0/1] Source with duplicate sources (duplicated_source) (Note G17) (meta.code) | |
| scan_direction_strength_k1 | 0.059 | [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18) (meta.code) | |
| scan_direction_strength_k2 | 0.221 | [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18) (meta.code) | |
| scan_direction_strength_k3 | 0.074 | [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18) (meta.code) | |
| scan_direction_strength_k4 | 0.377 | [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18) (meta.code) | |
| scan_direction_mean_k1 | -50.84451300 | deg | Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19) (meta.code) |
| scan_direction_mean_k2 | -71.07947500 | deg | Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19) (meta.code) |
| scan_direction_mean_k3 | 15.05213100 | deg | Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19) (meta.code) |
| scan_direction_mean_k4 | -34.49261000 | deg | Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19) (meta.code) |
| phot_g_n_obs | 136 | Number of observations contributing to G photometry (phot_g_n_obs) (meta.number) | |
| phot_g_mean_flux | 407780.84731 | e-/s | (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt) |
| phot_g_mean_flux_error | 190.94549 | e-/s | (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error) |
| phot_g_mean_mag | 11.499 | mag | (i) G-band mean magnitude (phot_g_mean_mag) (Note G20) (phot.mag;stat.mean;em.opt) |
| phot_variable_flag | NOT_AVAILABLE | Photometric variability flag (phot_variable_flag) (Note G21) (meta.code;src.var) | |
| l | 107.5849427381 | deg | (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon) |
| b | 14.1181169918 | deg | (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat) |
| ecl_lon | 35.8123502087 | deg | Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon) |
| ecl_lat | 71.2081476347 | deg | Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat) |
| _RA.icrs | 322.0622117856 | deg | (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra) |
| _DE.icrs | +70.6569781823 | deg | (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec) |
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