{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T21:14:42.652Z","years_from_j2000":26.679,"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":"wasp-183-b","name":"WASP-183 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1061.2378371234083,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":163.7888521,"dec_deg":-0.7370663,"epoch_ra_deg":164.132411,"epoch_dec_deg":-0.880156,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-183","semi_major_axis_km":6929373.370824,"periapsis_km":null,"mass_kg":9.528633249369072e+26,"mass_msun":0.000479209,"constellation":"Leo","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/wasp-183-b","radius_km":105093.420663,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-183","host_v_mag":13.081,"uncertainties":{"mass_kg":[8.92123033307463e+25,8.92123033307463e+25],"radius_km":[23592.400557,67202.595526],"distance_ly":[12.67117527429548,12.97776226934922],"host_mass_solar":[0.038,0.038],"inclination_deg":[0.88,0.61],"host_radius_solar":[0.038,0.038],"host_temperature_k":[72,72],"semi_major_axis_km":[112198.40302499999,112198.40302499999],"orbital_period_days":[0.0000051,0.0000051]},"host_mass_solar":0.784,"inclination_deg":85.37,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.871,"planets_in_system":1,"discovery_facility":"SuperWASP","host_spectral_type":"G9","host_temperature_k":5313,"orbital_period_days":4.1117771,"transit_midpoint_bjd":2457796.1845,"equilibrium_temperature_k":1111},"designations":[{"catalog":"Exoplanet","designation":"WASP-183 b"},{"catalog":"Host star","designation":"WASP-183"}],"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."}