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(The bold columns are indexed columns)
Column NameDescriptionDatatype
astrometric_delta_qHipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only)REAL
astrometric_excess_noiseExcess noise of the sourceDOUBLE
astrometric_excess_noise_sigSignificance of excess noiseDOUBLE
astrometric_n_bad_obs_acNumber of bad observations ACINTEGER
astrometric_n_bad_obs_alNumber of bad observations ALINTEGER
astrometric_n_good_obs_acNumber of good observations ACINTEGER
astrometric_n_good_obs_alNumber of good observations ALINTEGER
astrometric_n_obs_acTotal number of observations ACINTEGER
astrometric_n_obs_alTotal number of observations ALINTEGER
astrometric_primary_flagPrimary or secondaySMALLINT
astrometric_priors_usedType of prior used in the astrometric solutionINTEGER
astrometric_relegation_factorRelegation factorREAL
astrometric_weight_acMean astrometric weight of the sourceREAL
astrometric_weight_alMean astrometric weight of the sourceREAL
bGalactic latitudeDOUBLE
decDeclinationDOUBLE
dec_errorStandard error of declinationDOUBLE
dec_parallax_corrCorrelation between declination and parallaxREAL
dec_pmdec_corrCorrelation between declination and proper motion in declinationREAL
dec_pmra_corrCorrelation between declination and proper motion in right ascensionREAL
duplicated_sourceSource with duplicate sourcesSMALLINT
ecl_latEcliptic latitudeDOUBLE
ecl_lonEcliptic longitudeDOUBLE
hipHipparcos identifierINTEGER
lGalactic longitudeDOUBLE
matched_observationsAmount of observations matched to this sourceSMALLINT
parallaxParallaxDOUBLE
parallax_errorStandard error of parallaxDOUBLE
parallax_pmdec_corrCorrelation between parallax and proper motion in declinationREAL
parallax_pmra_corrCorrelation between parallax and proper motion in right ascensionREAL
phot_g_mean_fluxG-band mean fluxDOUBLE
phot_g_mean_flux_errorError on G-band mean fluxDOUBLE
phot_g_mean_magG-band mean magnitudeDOUBLE
phot_g_n_obsNumber of observations contributing to G photometryINTEGER
phot_variable_flagPhotometric variability flagCHAR
pmdecProper motion in declination directionDOUBLE
pmdec_errorStandard error of proper motion in declination directionDOUBLE
pmraProper motion in right ascension directionDOUBLE
pmra_errorStandard error of proper motion in right ascension directionDOUBLE
pmra_pmdec_corrREAL
raRight ascensionDOUBLE
ra_dec_corrCorrelation between right ascension and declinationREAL
ra_errorStandard error of right ascensionDOUBLE
ra_parallax_corrCorrelation between right ascension and parallaxREAL
ra_pmdec_corrCorrelation between right ascension and proper motion in declinationREAL
ra_pmra_corrREAL
random_indexRandom index used to select subsetsBIGINT
ref_epochReference epochDOUBLE
scan_direction_mean_k1Mean position angle of scan directions across the sourceREAL
scan_direction_mean_k2Mean position angle of scan directions across the sourceREAL
scan_direction_mean_k3Mean position angle of scan directions across the sourceREAL
scan_direction_mean_k4Mean position angle of scan directions across the sourceREAL
scan_direction_strength_k1Degree of concentration of scan directions across the sourceREAL
scan_direction_strength_k2Degree of concentration of scan directions across the sourceREAL
scan_direction_strength_k3Degree of concentration of scan directions across the sourceREAL
scan_direction_strength_k4Degree of concentration of scan directions across the sourceREAL
solution_idSolution IdentifierBIGINT
source_idUnique source identifierBIGINT
tycho2_idTycho 2 identifierCHAR