{"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":"2026-09-06T16:44:07.690Z","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":"kelt-24-b","name":"KELT-24 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":314.7973295500024,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":161.9090273,"dec_deg":71.655727,"epoch_ra_deg":162.397471,"epoch_dec_deg":71.514064,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"KELT-24","semi_major_axis_km":9948258.40155,"periapsis_km":null,"mass_kg":8.712391912883348e+27,"mass_msun":0.00438159,"constellation":"Ursa Major","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/kelt-24-b","radius_km":81071.92775199101,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"KELT-24","host_v_mag":8.34,"eccentricity":0.0319,"uncertainties":{"mass_kg":[3.4166242795620975e+26,3.4166242795620975e+26],"radius_km":[1858.7920063500003,1930.284001688],"distance_ly":[1.0153248038322222,1.0215217750088403],"eccentricity":[0.0074,0.0079],"host_mass_solar":[0.063,0.063],"inclination_deg":[0.36,0.24],"host_radius_solar":[0.03,0.032],"host_temperature_k":[91,93],"semi_major_axis_km":[164557.65777,164557.65777],"orbital_period_days":[5.3e-7,5e-7],"argument_of_periastron_deg":[27,26]},"host_mass_solar":1.268,"inclination_deg":89.67,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.338,"planets_in_system":1,"discovery_facility":"KELT-North","host_spectral_type":"F7","host_temperature_k":6426,"orbital_period_days":5.55149296,"periastron_epoch_bjd":2457145.77,"transit_midpoint_bjd":2459173.347426,"equilibrium_temperature_k":1391,"argument_of_periastron_deg":3},"designations":[{"catalog":"Exoplanet","designation":"KELT-24 b"},{"catalog":"Host star","designation":"KELT-24"}],"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."}