{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T14:34:29.771Z","years_from_j2000":26.681,"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-8-c","name":"WASP-8 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":293.41223433224866,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":359.9008737,"dec_deg":-35.0313349,"epoch_ra_deg":0.246554,"epoch_dec_deg":-34.881772,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-8","semi_major_axis_km":789876757.296,"periapsis_km":null,"mass_kg":1.7936629809088594e+28,"mass_msun":0.00902059,"constellation":"Sculptor","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/wasp-8-c","radius_km":79726.25,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-8","host_v_mag":9.789,"eccentricity":0,"uncertainties":{"mass_kg":[1.9739806453410844e+27,4.289629014398514e+27],"distance_ly":[1.1800337745791778,1.18981846591068],"host_mass_solar":[0.08,0.08],"host_radius_solar":[0.03,0.03],"host_temperature_k":[36,36],"semi_major_axis_km":[50863276.038,94246658.541],"orbital_period_days":[380,740]},"host_mass_solar":1.04,"stars_in_system":2,"discovery_method":"Radial Velocity","host_radius_solar":0.96,"planets_in_system":2,"discovery_facility":"SuperWASP","host_spectral_type":"G8 V","host_temperature_k":5690,"orbital_period_days":4323,"periastron_epoch_bjd":2452613,"equilibrium_temperature_k":116.99,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"WASP-8 c"}],"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."}