{"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":"2026-09-06T16:13:25.787Z","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-188-b","name":"WASP-188 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2202.472049009402,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":278.7819771,"dec_deg":36.6156327,"epoch_ra_deg":279.016087,"epoch_dec_deg":36.636503,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-188","semi_major_axis_km":10771046.690399999,"periapsis_km":null,"mass_kg":2.738993797442976e+27,"mass_msun":0.00137748,"constellation":"Lyra","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/wasp-188-b","radius_km":94512.423768469,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-188","host_v_mag":12.165,"eccentricity":0,"uncertainties":{"mass_kg":[5.656411307513914e+26,5.61844881516045e+26],"radius_km":[3646.092017362,3646.092017362],"distance_ly":[31.10553374284582,31.999202217789698],"host_mass_solar":[0.09,0.09],"inclination_deg":[0.2,0.2],"host_radius_solar":[0.069,0.069],"host_temperature_k":[125,125],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.000003,0.000003]},"host_mass_solar":1.5,"inclination_deg":85.88,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.83,"planets_in_system":1,"discovery_facility":"SuperWASP","host_temperature_k":6850,"orbital_period_days":5.748916,"transit_midpoint_bjd":2457033.12141,"equilibrium_temperature_k":1666},"designations":[{"catalog":"Exoplanet","designation":"WASP-188 b"},{"catalog":"Host star","designation":"WASP-188"}],"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."}