{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T11:32:34.524Z","years_from_j2000":26.675,"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-20-b","name":"CoRoT-20 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2752.958783319722,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":97.7204249,"dec_deg":0.2268931,"epoch_ra_deg":98.065086,"epoch_dec_deg":0.20863,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"CoRoT-20","semi_major_axis_km":13463808.362999998,"periapsis_km":null,"mass_kg":8.161976687706577e+27,"mass_msun":0.00410478,"constellation":"Monoceros","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/corot-20-b","radius_km":60053.383236,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"CoRoT-20","host_v_mag":14.63,"eccentricity":0.59,"uncertainties":{"mass_kg":[3.7962682268402685e+26,3.7962682268402685e+26],"radius_km":[2859.684916,2859.684916],"distance_ly":[74.6343639129224,78.83525805791405],"eccentricity":[0.02,0.02],"host_mass_solar":[0.08,0.08],"inclination_deg":[0.53,0.53],"host_radius_solar":[0.05,0.05],"host_temperature_k":[90,90],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.0003,0.0003],"argument_of_periastron_deg":[2.3,2.5]},"host_mass_solar":1.14,"inclination_deg":88.21,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.02,"planets_in_system":2,"discovery_facility":"CoRoT","host_spectral_type":"G2 V","host_temperature_k":5880,"orbital_period_days":9.24285,"periastron_epoch_bjd":2455265.79074,"transit_midpoint_bjd":2455266.0001,"equilibrium_temperature_k":1024,"argument_of_periastron_deg":60.1},"designations":[{"catalog":"Exoplanet","designation":"CoRoT-20 b"}],"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."}