{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-05T23:52:05.180Z","years_from_j2000":26.679,"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-129-b","name":"WASP-129 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":983.237539392449,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":176.2990518,"dec_deg":-42.0639575,"epoch_ra_deg":176.632823,"epoch_dec_deg":-42.213078,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-129","semi_major_axis_km":9394746.279959999,"periapsis_km":null,"mass_kg":1.898134113420134e+27,"mass_msun":0.000954599,"constellation":"Centaurus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/wasp-129-b","radius_km":66487.674297,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-129","host_v_mag":12.179,"uncertainties":{"mass_kg":[1.8981341134201343e+26,1.8981341134201343e+26],"radius_km":[2144.763687,2144.763687],"distance_ly":[10.785991411092704,11.024085566825928],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.2,0.2],"host_radius_solar":[0.02,0.02],"host_temperature_k":[100,100],"semi_major_axis_km":[104718.50949,104718.50949],"orbital_period_days":[0.000004,0.000004]},"host_mass_solar":1,"inclination_deg":87.7,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.9,"planets_in_system":1,"discovery_facility":"SuperWASP-South","host_spectral_type":"G1","host_temperature_k":5900,"orbital_period_days":5.748145,"transit_midpoint_bjd":2457027.4373,"eccentricity_upper_limit":0.096,"equilibrium_temperature_k":1100},"designations":[{"catalog":"Exoplanet","designation":"WASP-129 b"},{"catalog":"Host star","designation":"WASP-129"}],"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."}