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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=357052
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ColumnValue  Explain   (UCD)
_RAJ200013 44 22.594929515 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+48 01 43.21024871 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195013 42 21.451267669 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+48 16 46.18597641 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon100.166779923970 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat+66.692549439354 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
357052recno 357052  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP    Hipparcos identifier (hip) (meta.id.cross)
TYC23466-819-1  Tycho 2 identifier (tycho2_id) (meta.id.cross)
SolID1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
Source1510191590256382976  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
RandomI 738563  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_ICRS206.0940182765 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.218 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
DE_ICRS+48.0285682886 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.140 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
Plx 7.26 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
e_Plx 0.48 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -20.426 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
e_pmRA 0.647 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmDE -24.294 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
e_pmDE 0.893 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
RADEcor-0.216  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
RAPlxcor-0.834  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
RApmRAcor 0.426  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
RApmDEcor 0.743  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
DEPlxcor 0.098  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
DEpmRAcor-0.070  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
DEpmDEcor 0.206  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
PlxpmRAcor-0.531  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
PlxpmDEcor-0.853  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmRApmDEcor 0.197  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
NAL 132  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
NAC 132  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
NgAL 131  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
NgAC 126  Number of good observations AC (astrometric_n_good_obs_ac) (Note G9)   (meta.number)
NbAL 1  Number of bad observations AL (astrometric_n_bad_obs_al) (Note G10)   (meta.number)
NbAC 6  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 0.50 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
sepsi 4.8e+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 4.91  Relegation factor (astrometric_relegation_factor) (arith.factor)
WAL 3.864 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
WAC 3.70e-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 18  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 0.608   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
sK2 0.459   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
sK3 0.378   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
sK4 0.529   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
mK1 26.24997100 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
mK2 34.53343200 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
mK3 24.86774300 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
mK4 25.33607700 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
o_<Gmag> 148  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
<FG> 524378.66033 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
e_<FG> 2048.86282 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
<Gmag>11.226 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)
GLON100.1667814934 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
GLAT 66.6925479391 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ELON177.5345097393 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ELAT 53.0475504297 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs206.0941455396 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+48.0286695135 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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