{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T10:31:16.591Z","years_from_j2000":26.683,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"gaia-2-b","name":"Gaia-2 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":682.4137275329651,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":110.7353308,"dec_deg":67.2526565,"epoch_ra_deg":111.414022,"epoch_dec_deg":67.201017,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Gaia-2","semi_major_axis_km":6986220.561689999,"periapsis_km":null,"mass_kg":1.550767798007213e+27,"mass_msun":0.000779903,"constellation":"Camelopardalis","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/gaia-2-b","radius_km":94512.423768469,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Gaia-2","host_v_mag":11.277,"uncertainties":{"mass_kg":[8.921185619453804e+25,8.921185619453804e+25],"radius_km":[929.3960031750001,929.3960031750001],"distance_ly":[3.6562129942046937,3.69861332330787],"host_mass_solar":[0.095,0.095],"inclination_deg":[0.25,0.25],"host_radius_solar":[0.031,0.031],"host_temperature_k":[84,84],"semi_major_axis_km":[224396.80604999998,224396.80604999998],"orbital_period_days":[0.0000039,0.0000039]},"host_mass_solar":1,"inclination_deg":85.21,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.064,"planets_in_system":1,"discovery_facility":"European Space Agency (ESA) Gaia Satellite","host_temperature_k":5720,"orbital_period_days":3.6915224,"transit_midpoint_bjd":2458843.98875,"equilibrium_temperature_k":1213.23},"designations":[{"catalog":"Exoplanet","designation":"Gaia-2 b"},{"catalog":"Host star","designation":"Gaia-2"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}