{"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":"2026-09-05T23:02:55.872Z","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-33-b","name":"WASP-33 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":397.7281332429056,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":36.7127375,"dec_deg":37.5504441,"epoch_ra_deg":37.12471,"epoch_dec_deg":37.671379,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-33","semi_major_axis_km":3575389.1097299997,"periapsis_km":null,"mass_kg":3.9727946993883407e+27,"mass_msun":0.00199798,"constellation":"Andromeda","discovered":"2010","featured":false,"url":"https://spacecatalog.org/object/wasp-33-b","radius_km":113886.95177970002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-33","host_v_mag":8.14,"eccentricity":0,"uncertainties":{"mass_kg":[2.6384064176539863e+26,2.6384064176539863e+26],"radius_km":[5290.4170946,5290.4170946],"distance_ly":[3.206117192955588,3.2550406496130995],"host_mass_solar":[0.031,0.031],"inclination_deg":[0.03,0.03],"host_radius_solar":[0.034,0.034],"host_temperature_k":[100,100],"semi_major_axis_km":[94246.658541,94246.658541],"orbital_period_days":[0.000001,0.000001]},"host_mass_solar":1.495,"inclination_deg":86.63,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.444,"planets_in_system":1,"discovery_facility":"SuperWASP","host_spectral_type":"A","host_temperature_k":7430,"orbital_period_days":1.21987,"transit_midpoint_bjd":2459883.198788,"equilibrium_temperature_k":2781.7},"designations":[{"catalog":"Exoplanet","designation":"WASP-33 b"},{"catalog":"Host star","designation":"WASP-33"}],"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."}