{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T11:49:32.633Z","years_from_j2000":26.68,"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":"gj-463-b","name":"GJ 463 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":59.86730775541912,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":185.7440496,"dec_deg":64.0324311,"epoch_ra_deg":186.061445,"epoch_dec_deg":63.88343,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"GJ 463","semi_major_axis_km":528080483.5709999,"periapsis_km":null,"mass_kg":6.45362363917285e+27,"mass_msun":0.00324562,"constellation":"Draco","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/gj-463-b","radius_km":83553.11,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"GJ 463","host_v_mag":11.595,"eccentricity":0.146,"uncertainties":{"mass_kg":[5.6943737992701615e+26,5.6943737992701615e+26],"distance_ly":[0.035551045171125034,0.035551045171125034],"eccentricity":[0.015,0.014],"host_mass_solar":[0.014,0.014],"inclination_deg":[3,2],"host_radius_solar":[0.008,0.008],"host_temperature_k":[28,28],"semi_major_axis_km":[5684719.086599999,5535121.215899999],"orbital_period_days":[22,22],"argument_of_periastron_deg":[5.8,5.9]},"host_mass_solar":0.486,"inclination_deg":152,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.483,"planets_in_system":1,"discovery_facility":"Multiple Observatories","host_spectral_type":"M3.0 V","host_temperature_k":3563,"orbital_period_days":3459,"periastron_epoch_bjd":2454457,"transit_midpoint_bjd":2454313,"equilibrium_temperature_k":63.55,"argument_of_periastron_deg":329.3},"designations":[{"catalog":"Exoplanet","designation":"GJ 463 b"},{"catalog":"Host star","designation":"GJ 463"}],"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."}