{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T14:54:01.614Z","years_from_j2000":26.678,"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-164-b","name":"WASP-164 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1068.1817064049976,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":344.8735878,"dec_deg":-60.4478194,"epoch_ra_deg":345.289337,"epoch_dec_deg":-60.303912,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-164","semi_major_axis_km":4215667.9963259995,"periapsis_km":null,"mass_kg":4.043025661584885e+27,"mass_msun":0.0020333,"constellation":"Tucana","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/wasp-164-b","radius_km":80643.1146312,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-164","host_v_mag":12.603,"eccentricity":0,"uncertainties":{"mass_kg":[2.4675743474461742e+26,2.277760936104161e+26],"radius_km":[3074.1612847,2931.1770389000003],"distance_ly":[12.778806878942008,13.085393873995745],"host_mass_solar":[0.071,0.067],"inclination_deg":[0.21,0.22],"host_radius_solar":[0.03,0.028],"host_temperature_k":[200,190],"semi_major_axis_km":[107710.466904,97238.61595499999],"orbital_period_days":[0.0000028,0.0000028]},"host_mass_solar":0.946,"inclination_deg":82.73,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.932,"planets_in_system":1,"discovery_facility":"SuperWASP-South","host_spectral_type":"G2 V","host_temperature_k":5806,"orbital_period_days":1.7771255,"transit_midpoint_bjd":2457203.85378,"equilibrium_temperature_k":1610},"designations":[{"catalog":"Exoplanet","designation":"WASP-164 b"},{"catalog":"Host star","designation":"WASP-164"}],"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."}