{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T14:39:25.102Z","years_from_j2000":26.67,"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-2-b","name":"WASP-2 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":499.8085563406919,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":307.7255587,"dec_deg":6.4293305,"epoch_ra_deg":308.056026,"epoch_dec_deg":6.519313,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-2","semi_major_axis_km":4703357.054808,"periapsis_km":null,"mass_kg":1.7671628595941448e+27,"mass_msun":0.000888732,"constellation":"Delphinus","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/wasp-2-b","radius_km":77282.98485490002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-2","host_v_mag":11.728,"eccentricity":0.0054,"uncertainties":{"mass_kg":[1.1009177857836777e+26,1.1388804680520805e+26],"radius_km":[2859.684916,2931.1770389000003],"distance_ly":[5.234809862353732,5.348964594554592],"eccentricity":[0.0044,0.009],"host_mass_solar":[0.072,0.077],"inclination_deg":[0.18,0.17],"host_radius_solar":[0.03,0.031],"host_temperature_k":[190,190],"semi_major_axis_km":[130150.14750899999,131646.126216],"orbital_period_days":[0.000011,0.000012],"argument_of_periastron_deg":[86,11]},"host_mass_solar":0.895,"inclination_deg":84.49,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.866,"planets_in_system":1,"discovery_facility":"SuperWASP","host_spectral_type":"K1","host_temperature_k":5180,"orbital_period_days":2.152175,"transit_midpoint_bjd":2458339.00342,"equilibrium_temperature_k":1311,"argument_of_periastron_deg":267},"designations":[{"catalog":"Exoplanet","designation":"WASP-2 b"},{"catalog":"Host star","designation":"WASP-2"}],"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":"2026-09-01T22:58:55.274Z","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."}