{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T21:24:52.877Z","years_from_j2000":26.676,"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-3-b","name":"WASP-3 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":753.9463442938013,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":278.6317411,"dec_deg":35.6614312,"epoch_ra_deg":278.86953,"epoch_dec_deg":35.681917,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-3","semi_major_axis_km":4712332.92705,"periapsis_km":null,"mass_kg":4.612465895610926e+27,"mass_msun":0.00231968,"constellation":"Lyra","discovered":"2007","featured":false,"url":"https://spacecatalog.org/object/wasp-3-b","radius_km":101518.814518,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-3","host_v_mag":10.632,"eccentricity":0,"uncertainties":{"mass_kg":[1.0060110801126711e+27,1.0060110801126711e+27],"radius_km":[12153.660893,12153.660893],"distance_ly":[5.300041137897081,5.3750571047719315],"host_mass_solar":[0.53,0.53],"inclination_deg":[0.16,0.16],"host_radius_solar":[0.12,0.12],"host_temperature_k":[100,100],"semi_major_axis_km":[44879.361209999995,44879.361209999995],"orbital_period_days":[0.000002,0.000002],"argument_of_periastron_deg":[130,10]},"host_mass_solar":1.62,"inclination_deg":85.06,"stars_in_system":3,"discovery_method":"Transit","host_radius_solar":1.44,"planets_in_system":1,"discovery_facility":"SuperWASP","host_temperature_k":6400,"orbital_period_days":1.84683,"transit_midpoint_bjd":2455554.83317,"equilibrium_temperature_k":2020,"argument_of_periastron_deg":79},"designations":[{"catalog":"Exoplanet","designation":"WASP-3 b"},{"catalog":"Host star","designation":"WASP-3"}],"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."}