{"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":"2026-09-06T20:40:24.698Z","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-66-b","name":"WASP-66 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1631.6233720382263,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":158.2250301,"dec_deg":-34.9899074,"epoch_ra_deg":158.529081,"epoch_dec_deg":-35.128103,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-66","semi_major_axis_km":8168043.74022,"periapsis_km":null,"mass_kg":4.460615166537315e+27,"mass_msun":0.00224331,"constellation":"Antlia","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/wasp-66-b","radius_km":100088.97206000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-66","host_v_mag":11.605,"eccentricity":0,"uncertainties":{"mass_kg":[1.8601714311517316e+27,1.8601714311517316e+27],"radius_km":[20017.794412000003,20017.794412000003],"distance_ly":[41.839340133503846,44.06046506575487],"host_mass_solar":[0.83,0.83],"inclination_deg":[0.9,0.9],"host_radius_solar":[0.35,0.35],"host_temperature_k":[150,150],"semi_major_axis_km":[134638.08362999998,134638.08362999998],"orbital_period_days":[0.000007,0.000007]},"host_mass_solar":1.33,"inclination_deg":85.9,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.76,"planets_in_system":1,"discovery_facility":"SuperWASP","host_temperature_k":6600,"orbital_period_days":4.08605,"transit_midpoint_bjd":2457477.71072,"equilibrium_temperature_k":1569.7},"designations":[{"catalog":"Exoplanet","designation":"WASP-66 b"},{"catalog":"Host star","designation":"WASP-66"}],"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."}