{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T04:52:44.747Z","years_from_j2000":26.682,"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-1183-b","name":"Kepler-1183 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":6259.5605855019685,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":292.2324228,"dec_deg":38.8921946,"epoch_ra_deg":292.464255,"epoch_dec_deg":38.946942,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1183","semi_major_axis_km":26822898.216509994,"periapsis_km":null,"mass_kg":4.986760169605801e+25,"mass_msun":0.0000250791,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1183-b","radius_km":17986.242,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1183","host_v_mag":15.968,"eccentricity":0,"uncertainties":{"radius_km":[1913.43,3316.612],"distance_ly":[482.7440546585519,568.5231819980554],"host_mass_solar":[0.068,0.062],"host_radius_solar":[0.098,0.178],"host_temperature_k":[176.4,121.54],"orbital_period_days":[0.0003031,0.0003031]},"host_mass_solar":1,"inclination_deg":88.47,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.99,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5765,"orbital_period_days":28.5057189,"transit_midpoint_bjd":2454965.92018,"equilibrium_temperature_k":555},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1183 b"},{"catalog":"Host star","designation":"Kepler-1183"}],"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."}