{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T07:10:52.699Z","years_from_j2000":26.685,"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-73-b","name":"WASP-73 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1032.8654938258287,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":319.9496969,"dec_deg":-58.1489328,"epoch_ra_deg":320.450628,"epoch_dec_deg":-58.035481,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-73","semi_major_axis_km":8245834.632983999,"periapsis_km":null,"mass_kg":5.428663564381584e+27,"mass_msun":0.00273015,"constellation":"Indus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/wasp-73-b","radius_km":101518.814518,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-73","host_v_mag":10.468,"eccentricity":0,"uncertainties":{"mass_kg":[1.7462833843465233e+27,1.7462833843465233e+27],"radius_km":[15728.267038000002,15728.267038000002],"distance_ly":[9.582474377317922,9.76186038506213],"host_mass_solar":[1.22,1.22],"inclination_deg":[2.1,2.1],"host_radius_solar":[0.38,0.38],"host_temperature_k":[120,120],"semi_major_axis_km":[79286.87147099999,89758.72241999999],"orbital_period_days":[0.00022,0.00022]},"host_mass_solar":2.52,"inclination_deg":87.4,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.55,"planets_in_system":1,"discovery_facility":"SuperWASP","host_spectral_type":"F9","host_temperature_k":6030,"orbital_period_days":4.08722,"transit_midpoint_bjd":2458462.55487,"equilibrium_temperature_k":1790},"designations":[{"catalog":"Exoplanet","designation":"WASP-73 b"},{"catalog":"Host star","designation":"WASP-73"}],"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."}