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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=1607186
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ColumnValue  Explain   (UCD)
_RAJ200007 22 00.987258768 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-25 52 35.93241636 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195007 19 57.607315327 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-25 46 49.24093145 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon239.349211115047 deg Galactic longitude at Epoch=J2015, proper motions taken into account (pos.galactic.lon)
_Glat-05.306544486017 deg Galactic latitude at Epoch=J2015, proper motions taken into account (pos.galactic.lat)
1607186recno 1607186  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

hip    Hipparcos identifier (hip) (meta.id.cross)
tycho2_id6541-1691-1  Tycho 2 identifier (tycho2_id) (meta.id.cross)
solution_id1635378410781933568  Solution ID (solution_id) (Note G1)   (meta.id;meta.version)
source_id5616190220836917760  (i) Source ID (source_id) (Note G2)   (meta.id;meta.main)
random_index1269262  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)
ra110.5040996806 deg (i) Right ascension (ICRS) at epoch 2015.0 (ra) (pos.eq.ra;meta.main)
ra_error 0.232 mas (i) Standard error of right ascension (ra_error) (stat.error;pos.eq.ra)
dec-25.8766348226 deg (i) Declination (ICRS) at epoch 2015.0 (dec) (pos.eq.dec;meta.main)
dec_error 0.313 mas (i) Standard error of declination (dec_error) (stat.error;pos.eq.dec)
parallax 0.61 mas (i) Absolute barycentric stellar parallax of the source at the reference epoch Epoch (parallax) (pos.parallax)
parallax_error 0.36 mas (i) Standard error of parallax (parallax_error) (stat.error;pos.parallax)
pmRA -3.001 mas/yr (i) Proper motion in right ascension direction (pmRA) (Note G5)   (pos.pm;pos.eq.ra)
pmra_error 0.601 mas/yr (i) Standard error of proper motion in right ascension direction (pmra_error) (stat.error;pos.pm;pos.eq.ra)
pmdec 3.137 mas/yr (i) Proper motion in declination direction (pmdec) (Note G6)   (pos.pm;pos.eq.dec)
pmdec_error 0.532 mas/yr (i) Standard error of proper motion in declination direction (pmdec_error) (stat.error;pos.pm;pos.eq.dec)
ra_dec_corr-0.196  Correlation between right ascension and declination (ra_dec_corr) (stat.correlation)
ra_parallax_corr-0.275  Correlation between right ascension and parallax (ra_parallax_corr) (stat.correlation)
ra_pmra_corr-0.553  Correlation between right ascension and proper motion in right ascension (ra_pmra_corr) (stat.correlation)
ra_pmdec_corr 0.288  Correlation between right ascension and proper motion in declination (ra_pmdec_corr) (stat.correlation)
dec_parallax_corr 0.072  Correlation between declination and parallax (dec_parallax_corr) (stat.correlation)
dec_pmra_corr 0.288  Correlation between declination and proper motion in right ascension (dec_pmra_corr) (stat.correlation)
dec_pmdec_corr-0.577  Correlation between declination and proper motion in declination (dec_pmdec_corr) (stat.correlation)
parallax_pmra_corr 0.372  Correlation between parallax and proper motion in right ascension (parallax_pmra_corr) (stat.correlation)
parallax_pmdec_corr-0.308  Correlation between parallax and proper motion in declination (parallax_pmdec_corr) (stat.correlation)
pmra_pmdec_corr-0.330  Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr) (stat.correlation)
astrometric_n_obs_al 151  Total number of observations AL (astrometric_n_obs_al) (Note G7)   (meta.number)
astrometric_n_obs_ac 151  Total number of observations AC (astrometric_n_obs_ac) (Note G8)   (meta.number)
astrometric_n_good_obs_al 151  Number of good observations AL (astrometric_n_good_obs_al) (Note G9)   (meta.number)
astrometric_n_good_obs_ac 147  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 4  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 1.08 mas Excess noise of the source (astrometric_excess_noise) (Note G12)   (stat.value)
astrometric_excess_noise_sig 1.6e+03  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 10.48  Relegation factor (astrometric_relegation_factor) (arith.factor)
astrometric_weight_al 0.827 mas-2 Mean astrometric weight of the source in the AL direction (astrometric_weight_al) (stat.weight;stat.mean)
astrometric_weight_ac 2.68e-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 24  Amount of observations matched to this source (matched_observations) (Note G16)   (meta.number)
duplicated_source0   [0/1] Source with duplicate sources (duplicated_source) (Note G17)   (meta.code)
scan_direction_strength_k1 0.240   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k1) (Note G18)   (meta.code)
scan_direction_strength_k2 0.250   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k2) (Note G18)   (meta.code)
scan_direction_strength_k3 0.240   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k3) (Note G18)   (meta.code)
scan_direction_strength_k4 0.453   [0/1] Degree of concentration of scan directions across the source (scan_direction_strength_k4) (Note G18)   (meta.code)
scan_direction_mean_k1-139.73016000 deg Mean position angle of scan directions across the source (scan_direction_mean_k1) (Note G19)   (meta.code)
scan_direction_mean_k2-87.40038000 deg Mean position angle of scan directions across the source (scan_direction_mean_k2) (Note G19)   (meta.code)
scan_direction_mean_k3 19.78261400 deg Mean position angle of scan directions across the source (scan_direction_mean_k3) (Note G19)   (meta.code)
scan_direction_mean_k4 21.80969400 deg Mean position angle of scan directions across the source (scan_direction_mean_k4) (Note G19)   (meta.code)
phot_g_n_obs 209  Number of observations contributing to G photometry (phot_g_n_obs) (meta.number)
phot_g_mean_flux 1677994.76257 e-/s (i) G-band mean flux (phot_g_mean_flux) (phot.flux;stat.mean;em.opt)
phot_g_mean_flux_error 12471.02939 e-/s (i) Error on G-band mean flux (phot_g_mean_flux_error) (stat.error)
phot_g_mean_mag 9.963 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)
l239.3492134952 deg (i) Galactic longitude at epoch 2015.0 (l) (pos.galactic.lon)
b -5.3065431415 deg (i) Galactic latitude at epoch 2015.0 (b) (pos.galactic.lat)
ecl_lon117.7271582905 deg Ecliptic longitude at epoch 2015.0 (ecl_lon) (pos.ecliptic.lon)
ecl_lat-47.3614741626 deg Ecliptic latitude at epoch 2015.0 (ecl_lat) (pos.ecliptic.lat)

_RA.icrs110.5041135782 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-25.8766478934 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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