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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=324870
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ColumnValue  Explain   (UCD)
_RAJ200017 20 27.877525312 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+38 14 31.91100696 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195017 18 45.968836878 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+38 17 27.84625881 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon062.589153363690 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat+33.537509302601 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
324870recno 324870  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP    Hipparcos identifier (hip) (meta.id.cross)
TYC23086-152-1  Tycho 2 identifier (tycho2_id) (meta.id.cross)
SolID1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
Source1340497604189897216  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
RandomI2053832  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_ICRS260.1161715494 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.329 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
DE_ICRS+38.2421690436 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.295 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
Plx 3.97 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
e_Plx 0.30 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA 2.864 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
e_pmRA 1.432 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmDE -6.830 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
e_pmDE 1.381 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
RADEcor-0.747  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
RAPlxcor-0.575  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
RApmRAcor-0.526  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
RApmDEcor 0.742  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
DEPlxcor 0.799  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
DEpmRAcor 0.084  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
DEpmDEcor-0.955  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
PlxpmRAcor-0.314  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
PlxpmDEcor-0.795  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmRApmDEcor-0.064  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
NAL 43  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
NAC 43  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
NgAL 43  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
NgAC 42  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    Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only) (astrometric_delta_q) (Note G11)   (stat.value)
epsi 0.21 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
sepsi 5.2e+01  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 2.28  Relegation factor (astrometric_relegation_factor) (arith.factor)
WAL 19.170 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
WAC 2.26e-05 mas-2 Mean astrometric weight of the source in the AC direction (astrometric_weight_ac) (stat.weight;stat.mean)
Apr5   [3/5] Type of prior used in in the astrometric solution (astrometric_priors_used) (Note G15)   (meta.code)
MatchObs 7  Amount of observations matched to this source (matched_observations) (Note G16)   (meta.number)
Dup1   [0/1] Source with duplicate sources (duplicated_source) (Note G17)   (meta.code)
sK1 0.773   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
sK2 0.263   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
sK3 0.217   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
sK4 0.562   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
mK1 177.91188000 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
mK2 -2.63658740 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
mK3 -9.82775000 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
mK4 32.99087000 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
o_<Gmag> 50  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
<FG> 1879941.98148 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
e_<FG> 2125.46096 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
<Gmag> 9.839 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 62.5891561139 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
GLAT 33.5375079186 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ELON253.7881677895 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ELAT 61.1263761890 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs260.1161563555 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+38.2421975019 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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