{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T21:13:55.527Z","years_from_j2000":26.684,"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-23-b","name":"WASP-23 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":676.7418681244709,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":101.1275033,"dec_deg":-42.7622296,"epoch_ra_deg":101.335609,"epoch_dec_deg":-42.789104,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-23","semi_major_axis_km":5624879.93832,"periapsis_km":null,"mass_kg":1.6778805624559878e+27,"mass_msun":0.00084383,"constellation":"Puppis","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/wasp-23-b","radius_km":68775.0523,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-23","host_v_mag":12.539,"uncertainties":{"mass_kg":[1.8790828979218793e+26,1.670295909263893e+26],"radius_km":[4005.4468,3361.2587000000003],"distance_ly":[3.3333181802651177,3.3626722542596243],"host_mass_solar":[0.12,0.13],"inclination_deg":[0.45,0.79],"host_radius_solar":[0.049,0.033],"host_temperature_k":[100,100],"semi_major_axis_km":[359034.88967999996,239356.59312],"orbital_period_days":[0.0000013,0.0000011]},"host_mass_solar":0.78,"inclination_deg":88.39,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.765,"planets_in_system":1,"discovery_facility":"SuperWASP","host_temperature_k":5150,"orbital_period_days":2.9444256,"transit_midpoint_bjd":2455320.12363,"eccentricity_upper_limit":0.062,"equilibrium_temperature_k":1076.55},"designations":[{"catalog":"Exoplanet","designation":"WASP-23 b"},{"catalog":"Host star","designation":"WASP-23"}],"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."}