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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=1100756
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ColumnValue  Explain   (UCD)
_RAJ200018 21 49.782676186 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-11 55 21.65245338 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195018 19 02.012430909 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-11 56 47.49083395 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon018.963580131664 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat+01.030315672699 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
1100756recno 1100756  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP 90004   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)
Source4153637755002568576  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
RandomI1174011  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_ICRS275.4573301011 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
e_RA_ICRS 0.299 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
DE_ICRS-11.9229662454 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
e_DE_ICRS 0.315 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
Plx 23.79 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
e_Plx 0.31 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -22.946 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
e_pmRA 0.054 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmDE -68.402 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
e_pmDE 0.040 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
RADEcor 0.542  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
RAPlxcor-0.246  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
RApmRAcor 0.237  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
RApmDEcor 0.154  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
DEPlxcor-0.514  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
DEpmRAcor 0.125  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
DEpmDEcor 0.313  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
PlxpmRAcor-0.098  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
PlxpmDEcor-0.141  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmRApmDEcor 0.113  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
NAL 34  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
NAC 34  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
NgAL 34  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
NgAC 34  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 0  Number of bad observations AC (astrometric_n_bad_obs_ac) (Note G10)   (meta.number)
DQ 2.18   Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only) (astrometric_delta_q) (Note G11)   (stat.value)
epsi 0.51 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
sepsi 8.5e+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 5.08  Relegation factor (astrometric_relegation_factor) (arith.factor)
WAL 3.431 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
WAC 9.57e-06 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 5  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 0.302   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
sK2 0.535   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
sK3 0.416   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
sK4 0.981   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
mK1 -89.44704400 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
mK2-41.39786000 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
mK3-29.78557800 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
mK4 44.68363600 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
o_<Gmag> 39  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
<FG> 12976379.81565 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
e_<FG> 33783.44352 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
<Gmag> 7.742 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 18.9635824688 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
GLAT 1.0303151254 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ELON275.4472969750 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ELAT 11.4131803803 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs275.4574278174 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-11.9226812370 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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