{"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":"2026-09-05T13:13:40.814Z","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":"toi-4329-b","name":"TOI-4329 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2338.958708392528,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":329.5639152,"dec_deg":71.1316048,"epoch_ra_deg":329.680195,"epoch_dec_deg":71.259454,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-4329","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":8.541560698905243e+26,"mass_msun":0.000429567,"constellation":"Cepheus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-4329-b","radius_km":107237.99970400501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-4329","host_v_mag":12.724,"eccentricity":0.068,"uncertainties":{"mass_kg":[1.7083121397810487e+26,1.7083121397810487e+26],"radius_km":[13583.479943373,13583.479943373],"distance_ly":[33.972448302976,34.970486818789226],"eccentricity":[0.079,0.079],"host_mass_solar":[0.049,0.049],"host_radius_solar":[0.03,0.03],"host_temperature_k":[100,100],"orbital_period_days":[0.00015,0.00015],"argument_of_periastron_deg":[2.12,2.12]},"host_mass_solar":1.538,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.31,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6000,"orbital_period_days":2.9223,"transit_midpoint_bjd":2458765.068,"equilibrium_temperature_k":2027.12,"argument_of_periastron_deg":0.285},"designations":[{"catalog":"Exoplanet","designation":"TOI-4329 b"},{"catalog":"Host star","designation":"TOI-4329"}],"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."}