{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T15:40:14.313Z","years_from_j2000":26.681,"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":"corot-31-b","name":"CoRoT-31 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":6541.914161691353,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":94.820735,"dec_deg":-4.4222978,"epoch_ra_deg":95.153397,"epoch_dec_deg":-4.433015,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CoRoT-31","semi_major_axis_km":8766435.223019999,"periapsis_km":null,"mass_kg":1.5944326552729126e+27,"mass_msun":0.000801863,"constellation":"Monoceros","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/corot-31-b","radius_km":104378.49943400001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CoRoT-31","host_v_mag":15.479,"eccentricity":0.02,"uncertainties":{"mass_kg":[6.453655985628456e+26,6.453655985628456e+26],"radius_km":[21447.63687,21447.63687],"distance_ly":[475.24245797106687,553.7809137252586],"eccentricity":[0.16,0.16],"host_mass_solar":[0.21,0.22],"inclination_deg":[2.3,2.3],"host_radius_solar":[0.66,0.56],"host_temperature_k":[120,120],"semi_major_axis_km":[508632.76037999993,508632.76037999993],"orbital_period_days":[0.00075,0.00075],"argument_of_periastron_deg":[107.9,107.9]},"host_mass_solar":1.25,"inclination_deg":83.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.15,"planets_in_system":1,"discovery_facility":"CoRoT","host_spectral_type":"G2 IV","host_temperature_k":5700,"orbital_period_days":4.62941,"transit_midpoint_bjd":2455843.9445,"equilibrium_temperature_k":1664.86,"argument_of_periastron_deg":303.6},"designations":[{"catalog":"Exoplanet","designation":"CoRoT-31 b"},{"catalog":"Host star","designation":"CoRoT-31"}],"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."}