{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T10:54:38.632Z","years_from_j2000":26.686,"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-1-b","name":"Gaia-1 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1186.1002832047093,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":90.6436658,"dec_deg":-0.5771099,"epoch_ra_deg":90.986452,"epoch_dec_deg":-0.576925,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Gaia-1","semi_major_axis_km":6054225.827229,"periapsis_km":null,"mass_kg":3.188849327591291e+27,"mass_msun":0.00160372,"constellation":"Orion","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/gaia-1-b","radius_km":87863.667755568,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Gaia-1","host_v_mag":13.242,"uncertainties":{"mass_kg":[2.0879370597323927e+26,2.0879370597323927e+26],"radius_km":[1501.331965879,1501.331965879],"distance_ly":[9.810783841719642,9.973862030578013],"host_mass_solar":[0.066,0.066],"inclination_deg":[0.41,0.47],"host_radius_solar":[0.025,0.025],"host_temperature_k":[110,110],"semi_major_axis_km":[140621.998458,140621.998458],"orbital_period_days":[0.000017,0.000017]},"host_mass_solar":0.949,"inclination_deg":85.73,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.952,"planets_in_system":1,"discovery_facility":"European Space Agency (ESA) Gaia Satellite","host_temperature_k":5470,"orbital_period_days":3.052524,"transit_midpoint_bjd":2458468.68524,"equilibrium_temperature_k":1159.07},"designations":[{"catalog":"Exoplanet","designation":"Gaia-1 b"},{"catalog":"Host star","designation":"Gaia-1"}],"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."}