{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T02:05:32.837Z","years_from_j2000":26.671,"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":"kepler-24-b","name":"Kepler-24 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":3773.0095930650596,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":290.4132621,"dec_deg":38.3437283,"epoch_ra_deg":290.645826,"epoch_dec_deg":38.393997,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-24","semi_major_axis_km":12035148.697814997,"periapsis_km":null,"mass_kg":6.652995004719597e+25,"mass_msun":0.0000334589,"constellation":"Lyra","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-24-b","radius_km":14975.7788,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-24","host_v_mag":15.04,"eccentricity":0.023,"uncertainties":{"mass_kg":[1.152628398483736e+25,1.3437377702530602e+25],"radius_km":[580.4071,586.7852],"distance_ly":[104.63096597153128,104.63096597153128],"eccentricity":[0.016,0.014],"host_mass_solar":[0.069,0.069],"host_radius_solar":[0.039,0.039],"host_temperature_k":[116,116],"semi_major_axis_km":[131646.126216,131646.126216]},"host_mass_solar":1.06,"inclination_deg":77.26,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.099,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":6028,"orbital_period_days":8.14,"transit_midpoint_bjd":2454973.569084,"equilibrium_temperature_k":1050},"designations":[{"catalog":"Exoplanet","designation":"Kepler-24 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."}