{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T05:10:31.636Z","years_from_j2000":26.674,"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":"kps-1-b","name":"KPS-1 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":856.832373644548,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":165.167198,"dec_deg":64.9638452,"epoch_ra_deg":165.596531,"epoch_dec_deg":64.819758,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"KPS-1","semi_major_axis_km":4024182.7218299997,"periapsis_km":null,"mass_kg":2.0689661836279463e+27,"mass_msun":0.00104051,"constellation":"Ursa Major","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/kps-1-b","radius_km":73636.886587,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"KPS-1","host_v_mag":12.97,"eccentricity":0,"uncertainties":{"mass_kg":[1.6513766786755167e+26,1.632395337541315e+26],"radius_km":[8579.054748,9293.975977000002],"distance_ly":[8.382218907320306,8.545297096178677],"host_mass_solar":[0.1,0.09],"inclination_deg":[0.9,0.88],"host_radius_solar":[0.082,0.086],"host_temperature_k":[90,90],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.000059,0.000059]},"host_mass_solar":0.892,"inclination_deg":83.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.907,"planets_in_system":1,"discovery_facility":"Acton Sky Portal Observatory","host_spectral_type":"K1 V","host_temperature_k":5165,"orbital_period_days":1.706291,"transit_midpoint_bjd":2457508.37019,"equilibrium_temperature_k":1459},"designations":[{"catalog":"Exoplanet","designation":"KPS-1 b"},{"catalog":"Host star","designation":"KPS-1"}],"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."}