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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=558328
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ColumnValue  Explain   (UCD)
_RAJ200019 05 20.773156045 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+25 55 14.37234735 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195019 03 18.292631686 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+25 50 39.35267687 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon057.683961470386 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat+08.671927892792 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
558328recno 558328  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP 93746   Hipparcos identifier (hip) (meta.id.cross)
TYC2   Tycho 2 identifier (tycho2_id) (meta.id.cross)
SolID1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
Source2035963413410103168  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
RandomI2034015  Random index used to select subsets (random_index) (Note G3)   (meta.code)
Epoch2015.0 yr [2015.0] Reference epoch in Julian years (ref_epoch) (Note G4)   (meta.ref;time.epoch)
RA_ICRS286.3363638192 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.216 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
DE_ICRS+25.9204398730 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.283 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
Plx 15.94 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
e_Plx 0.37 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -41.228 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
e_pmRA 0.024 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmDE -52.587 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
e_pmDE 0.032 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
RADEcor-0.341  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
RAPlxcor-0.365  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
RApmRAcor 0.368  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
RApmDEcor-0.127  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
DEPlxcor 0.157  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
DEpmRAcor-0.137  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
DEpmDEcor 0.347  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
PlxpmRAcor-0.152  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
PlxpmDEcor 0.049  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmRApmDEcor-0.118  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
NAL 89  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
NAC 89  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
NgAL 89  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
NgAC 88  Number of good observations AC (astrometric_n_good_obs_ac) (Note G9)   (meta.number)
NbAL 0  Number of bad observations AL (astrometric_n_bad_obs_al) (Note G10)   (meta.number)
NbAC 1  Number of bad observations AC (astrometric_n_bad_obs_ac) (Note G10)   (meta.number)
DQ 2.47   Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only) (astrometric_delta_q) (Note G11)   (stat.value)
epsi 0.87 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
sepsi 1.2e+02  Significance of excess noise (astrometric_excess_noise_sig) (Note G13)   (stat.value)
APF1   [1] Primary or secondary (astrometric_primary_flag) (Note G14)   (meta.code)
ARF 8.51  Relegation factor (astrometric_relegation_factor) (arith.factor)
WAL 1.304 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
WAC 1.12e-05 mas-2 Mean astrometric weight of the source in the AC direction (astrometric_weight_ac) (stat.weight;stat.mean)
Apr3   [3/5] Type of prior used in in the astrometric solution (astrometric_priors_used) (Note G15)   (meta.code)
MatchObs 19  Amount of observations matched to this source (matched_observations) (Note G16)   (meta.number)
Dup0   [0/1] Source with duplicate sources (duplicated_source) (Note G17)   (meta.code)
sK1 0.196   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
sK2 0.423   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
sK3 0.316   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
sK4 0.380   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
mK1-101.12926000 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
mK2 68.45098000 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
mK3 17.81415000 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
mK4-20.39306400 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
o_<Gmag> 144  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
<FG> 30484692.47180 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
e_<FG> 11526.72984 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
<Gmag> 6.815 mag (i) G-band mean magnitude (phot_g_mean_mag) (Note G20)   (phot.mag;stat.mean;em.opt)
VarNOT_AVAILABLE  Photometric variability flag (phot_variable_flag) (Note G21)   (meta.code;src.var)
GLON 57.6839639005 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
GLAT 8.6719265702 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ELON292.2621347992 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ELAT 48.1049879924 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs286.3365548169 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+25.9206589854 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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