{"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":"2026-09-08T19:05:37.894Z","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":"kelt-15-b","name":"KELT-15 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1058.974311862054,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":117.4149764,"dec_deg":-52.1204471,"epoch_ra_deg":117.587116,"epoch_dec_deg":-52.187472,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"KELT-15","semi_major_axis_km":6900949.775390999,"periapsis_km":null,"mass_kg":2.4865556885803757e+27,"mass_msun":0.00125052,"constellation":"Carina","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kelt-15-b","radius_km":124396.293846,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"KELT-15","host_v_mag":11.39,"eccentricity":0,"uncertainties":{"mass_kg":[8.161976687706576e+26,8.161976687706576e+26],"radius_km":[14298.42458,14298.42458],"distance_ly":[7.964738743842875,8.08541660359807],"host_mass_solar":[0.75,0.75],"inclination_deg":[1.45,1.45],"host_radius_solar":[0.21,0.21],"host_temperature_k":[54,54],"semi_major_axis_km":[97238.61595499999,97238.61595499999],"orbital_period_days":[0.000016,0.000016]},"host_mass_solar":2.06,"inclination_deg":88.3,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.78,"planets_in_system":1,"discovery_facility":"KELT-South","host_temperature_k":6003,"orbital_period_days":3.32944,"transit_midpoint_bjd":2458973.57814,"equilibrium_temperature_k":1642},"designations":[{"catalog":"Exoplanet","designation":"KELT-15 b"},{"catalog":"Host star","designation":"KELT-15"}],"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."}