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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=174522
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ColumnValue  Explain   (UCD)
_RAJ200004 26 23.073741883 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+79 13 51.51828006 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195004 18 31.270396206 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+79 06 57.98822869 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon132.185537080909 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat+20.462246148721 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
174522recno 174522  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

hip    Hipparcos identifier (hip) (meta.id.cross)
tycho2_id4518-1759-1  Tycho 2 identifier (tycho2_id) (meta.id.cross)
solution_id1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
source_id 556479842888302208  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
random_index1603498  Random index used to select subsets (random_index) (Note G3)   (meta.code)
ref_epoch2015.0 yr [2015.0] Reference epoch in Julian years (ref_epoch) (Note G4)   (meta.ref;time.epoch)
ra066.5960365417 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
ra_error 0.114 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
dec+79.2309667042 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
dec_error 0.542 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
parallax 0.30 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
parallax_error 0.64 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -4.666 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
pmra_error 1.173 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmdec -2.543 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
pmdec_error 1.485 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
ra_dec_corr-0.234  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
ra_parallax_corr 0.317  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
ra_pmra_corr 0.175  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
ra_pmdec_corr 0.253  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
dec_parallax_corr-0.921  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
dec_pmra_corr-0.852  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
dec_pmdec_corr-0.945  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
parallax_pmra_corr 0.911  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
parallax_pmdec_corr 0.930  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmra_pmdec_corr 0.835  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
astrometric_n_obs_al 68  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
astrometric_n_obs_ac 68  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
astrometric_n_good_obs_al 68  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
astrometric_n_good_obs_ac 66  Number of good observations AC (astrometric_n_good_obs_ac) (Note G9)   (meta.number)
astrometric_n_bad_obs_al 0  Number of bad observations AL (astrometric_n_bad_obs_al) (Note G10)   (meta.number)
astrometric_n_bad_obs_ac 2  Number of bad observations AC (astrometric_n_bad_obs_ac) (Note G10)   (meta.number)
astrometric_delta_q    Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only) (astrometric_delta_q) (Note G11)   (stat.value)
astrometric_excess_noise 0.46 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
astrometric_excess_noise_sig 3.6e+02  Significance of excess noise (astrometric_excess_noise_sig) (Note G13)   (stat.value)
astrometric_primary_flag1   [1] Primary or secondary (astrometric_primary_flag) (Note G14)   (meta.code)
astrometric_relegation_factor 4.54  Relegation factor (astrometric_relegation_factor) (arith.factor)
astrometric_weight_al 4.461 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
astrometric_weight_ac 3.32e-05 mas-2 Mean astrometric weight of the source in the AC direction (astrometric_weight_ac) (stat.weight;stat.mean)
astrometric_priors_used5   [3/5] Type of prior used in in the astrometric solution (astrometric_priors_used) (Note G15)   (meta.code)
matched_observations 13  Amount of observations matched to this source (matched_observations) (Note G16)   (meta.number)
duplicated_source1   [0/1] Source with duplicate sources (duplicated_source) (Note G17)   (meta.code)
scan_direction_strength_k1 0.197   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
scan_direction_strength_k2 0.441   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
scan_direction_strength_k3 0.098   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
scan_direction_strength_k4 0.123   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
scan_direction_mean_k1 153.79755000 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
scan_direction_mean_k2-82.80830000 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
scan_direction_mean_k3 42.64421500 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
scan_direction_mean_k4-10.09782600 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
phot_g_n_obs 102  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
phot_g_mean_flux 624296.84698 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
phot_g_mean_flux_error 4570.60114 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
phot_g_mean_mag11.036 mag (i) G-band mean magnitude (phot_g_mean_mag) (Note G20)   (phot.mag;stat.mean;em.opt)
phot_variable_flagNOT_AVAILABLE  Photometric variability flag (phot_variable_flag) (Note G21)   (meta.code;src.var)
l132.1855389943 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
b 20.4622450484 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ecl_lon 82.2883862609 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ecl_lat 56.4199529878 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs066.5961405912 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+79.2309773000 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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