{"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":"2026-09-07T21:35:35.605Z","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-158-b","name":"WASP-158 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1712.298152066463,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":4.1463468,"dec_deg":-10.9764226,"epoch_ra_deg":4.488893,"epoch_dec_deg":-10.827087,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-158","semi_major_axis_km":7734209.91519,"periapsis_km":null,"mass_kg":5.295794176442174e+27,"mass_msun":0.00266333,"constellation":"Cetus","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/wasp-158-b","radius_km":76496.571503,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-158","host_v_mag":12.044,"eccentricity":0,"uncertainties":{"mass_kg":[4.365708460866308e+26,4.365708460866308e+26],"radius_km":[10723.818435,10723.818435],"distance_ly":[39.171380963780884,41.01416449788048],"host_mass_solar":[0.14,0.14],"inclination_deg":[1.5,1.5],"host_radius_solar":[0.18,0.18],"host_temperature_k":[150,150],"semi_major_axis_km":[269276.16725999996,269276.16725999996],"orbital_period_days":[0.000004,0.000004]},"host_mass_solar":1.38,"inclination_deg":87.7,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.39,"planets_in_system":1,"discovery_facility":"SuperWASP-South","host_spectral_type":"F6 V","host_temperature_k":6350,"orbital_period_days":3.656333,"transit_midpoint_bjd":2457619.9195,"equilibrium_temperature_k":1590},"designations":[{"catalog":"Exoplanet","designation":"WASP-158 b"},{"catalog":"Host star","designation":"WASP-158"}],"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."}