{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T19:44:35.437Z","years_from_j2000":26.67,"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-913-b","name":"Kepler-913 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":3234.225349587217,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":297.5830564,"dec_deg":41.9523531,"epoch_ra_deg":297.807003,"epoch_dec_deg":42.019787,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-913","semi_major_axis_km":15094425.15363,"periapsis_km":null,"mass_kg":2.926362255217776e+25,"mass_msun":0.0000147171,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-913-b","radius_km":13138.886,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-913","host_v_mag":15.522,"eccentricity":0,"uncertainties":{"radius_km":[382.68600000000004,510.24800000000005],"distance_ly":[104.1286851498475,111.16061665342049],"host_mass_solar":[0.014,0.013],"host_radius_solar":[0.011,0.012],"host_temperature_k":[30.74,34.09],"orbital_period_days":[0.00003426,0.00003426]},"host_mass_solar":0.63,"inclination_deg":89.4,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.61,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":4687,"orbital_period_days":10.29672521,"transit_midpoint_bjd":2454965.19659,"equilibrium_temperature_k":1129},"designations":[{"catalog":"Exoplanet","designation":"Kepler-913 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":"2026-09-02T18:38:07.546Z","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."}