{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T21:38:15.428Z","years_from_j2000":26.687,"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":"toi-6383-a-b","name":"TOI-6383 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":558.7678447405476,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":60.4246951,"dec_deg":60.8913677,"epoch_ra_deg":61.001668,"epoch_dec_deg":60.966573,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-6383 A","semi_major_axis_km":3428783.1964439997,"periapsis_km":null,"mass_kg":1.9767875642389466e+27,"mass_msun":0.000994155,"constellation":"Camelopardalis","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-6383-a-b","radius_km":72008.749,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-6383 A","host_v_mag":16.63,"eccentricity":0.05,"uncertainties":{"mass_kg":[1.791650360337414e+26,1.791650360337414e+26],"radius_km":[2359.897,2615.021],"distance_ly":[4.282433239420841,4.3476645149641895],"eccentricity":[0.033,0.042],"host_mass_solar":[0.011,0.011],"inclination_deg":[0.68,0.78],"host_radius_solar":[0.019,0.019],"host_temperature_k":[88,88],"semi_major_axis_km":[55351.212158999995,55351.212158999995],"orbital_period_days":[8.6e-7,8.7e-7],"argument_of_periastron_deg":[62,72]},"host_mass_solar":0.458,"inclination_deg":88.8,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.457,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M3","host_temperature_k":3444,"orbital_period_days":1.79058695,"transit_midpoint_bjd":2459933.59545,"equilibrium_temperature_k":745,"argument_of_periastron_deg":23.8},"designations":[{"catalog":"Exoplanet","designation":"TOI-6383 A b"},{"catalog":"Host star","designation":"TOI-6383 A"}],"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."}