{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T11:13:35.847Z","years_from_j2000":26.686,"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-2-a-b","name":"KELT-2 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":437.2387168395119,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":92.6640226,"dec_deg":30.9571333,"epoch_ra_deg":93.097997,"epoch_dec_deg":30.951925,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"KELT-2 A","semi_major_axis_km":8223394.952378999,"periapsis_km":null,"mass_kg":3.226827992814228e+27,"mass_msun":0.00162282,"constellation":"Auriga","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/kelt-2-a-b","radius_km":96514.365915,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"KELT-2 A","host_v_mag":8.68,"eccentricity":0,"uncertainties":{"mass_kg":[4.175895049524295e+26,4.175895049524295e+26],"radius_km":[5719.369832,5719.369832],"distance_ly":[2.5864200752937756,2.6157741492882822],"host_mass_solar":[0.28,0.28],"inclination_deg":[1.2,1.2],"host_radius_solar":[0.1,0.1],"host_temperature_k":[80,80],"semi_major_axis_km":[55351.212158999995,55351.212158999995],"orbital_period_days":[0.00001,0.00001]},"host_mass_solar":1.54,"inclination_deg":88.6,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.93,"planets_in_system":1,"discovery_facility":"KELT","host_spectral_type":"F8","host_temperature_k":6327,"orbital_period_days":4.11379,"periastron_epoch_bjd":2455974.60335,"transit_midpoint_bjd":2459467.198989,"equilibrium_temperature_k":2080,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"KELT-2 A b"},{"catalog":"Host star","designation":"KELT-2 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."}