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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=84871
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ColumnValue  Explain   (UCD)
_RAJ200002 04 10.279040610 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+46 41 16.21594385 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195002 01 00.605276037 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+46 26 54.01828835 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon135.698502232196 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat-14.373057300431 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
84871recno 84871  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP    Hipparcos identifier (hip) (meta.id.cross)
TYC23281-800-1  Tycho 2 identifier (tycho2_id) (meta.id.cross)
SolID1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
Source 356348282588373888  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
RandomI 347026  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_ICRS031.0427636202 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.428 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
DE_ICRS+46.6878507997 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.170 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
Plx 3.79 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
e_Plx 0.29 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -10.819 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
e_pmRA 2.346 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmDE 3.129 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
e_pmDE 0.857 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
RADEcor-0.054  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
RAPlxcor 0.712  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
RApmRAcor-0.900  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
RApmDEcor 0.787  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
DEPlxcor-0.517  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
DEpmRAcor-0.172  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
DEpmDEcor 0.165  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
PlxpmRAcor-0.525  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
PlxpmDEcor 0.466  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmRApmDEcor-0.907  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
NAL 81  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
NAC 81  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
NgAL 80  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
NgAC 79  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 2  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 0.39 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
sepsi 1.8e+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 3.91  Relegation factor (astrometric_relegation_factor) (arith.factor)
WAL 6.044 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
WAC 2.89e-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 9  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 0.483   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
sK2 0.201   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
sK3 0.490   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
sK4 0.509   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
mK1-102.16318500 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
mK2 2.53385400 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
mK3-50.77858000 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
mK4 24.39044200 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
o_<Gmag> 81  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
<FG> 603843.64574 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
e_<FG> 418.00995 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
<Gmag>11.072 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)
GLON135.6985048338 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
GLAT-14.3730583330 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ELON 46.2515985298 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ELAT 31.7945567749 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs031.0428293359 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+46.6878377622 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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