{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T20:28:19.158Z","years_from_j2000":26.668,"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-c","name":"Kepler-24 c","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":290.645795,"epoch_dec_deg":38.393979,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-24","semi_major_axis_km":15875326.038684,"periapsis_km":null,"mass_kg":5.966195699923588e+25,"mass_msun":0.0000300049,"constellation":"Lyra","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-24-c","radius_km":16034.5434,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-24","host_v_mag":15.04,"eccentricity":0.014,"uncertainties":{"mass_kg":[9.91379866053369e+24,1.2004057414260671e+25],"radius_km":[625.0538,625.0538],"distance_ly":[104.63096597153128,104.63096597153128],"eccentricity":[0.011,0.011],"host_mass_solar":[0.069,0.069],"host_radius_solar":[0.039,0.039],"host_temperature_k":[116,116],"semi_major_axis_km":[172037.55130499997,172037.55130499997]},"host_mass_solar":1.06,"inclination_deg":78.63,"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":12.33,"transit_midpoint_bjd":2454970.58738,"equilibrium_temperature_k":915},"designations":[{"catalog":"Exoplanet","designation":"Kepler-24 c"}],"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":"2026-08-30T09:56:50.739Z","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."}