{"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":"2026-09-05T11:16:52.810Z","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-1338-b","name":"TOI-1338 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1301.419393674018,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":92.1330955,"dec_deg":-59.5409853,"epoch_ra_deg":92.22299,"epoch_dec_deg":-59.544382,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1338 A","semi_major_axis_km":68919739.03149,"periapsis_km":null,"mass_kg":6.748549690604259e+25,"mass_msun":0.0000339394,"constellation":"Pictor","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/toi-1338-b","radius_km":48862.6241,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1338 A","host_v_mag":11.722,"eccentricity":0.0331,"uncertainties":{"mass_kg":[1.2541552522361896e+25,1.2541552522361896e+25],"radius_km":[338.0393,338.0393],"distance_ly":[10.153248038322223,10.313064663403427],"eccentricity":[0.0021,0.0022],"host_mass_solar":[0.0072,0.0072],"inclination_deg":[0.014,0.013],"host_radius_solar":[0.0038,0.0038],"host_temperature_k":[57,57],"semi_major_axis_km":[1316461.26216,1256622.1138799998],"orbital_period_days":[0.0056,0.0062],"argument_of_periastron_deg":[1.8,1.9]},"host_mass_solar":1.0936,"inclination_deg":90.494,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.313,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F8","host_temperature_k":5723.2,"orbital_period_days":95.4001,"transit_midpoint_bjd":2459238.21949,"equilibrium_temperature_k":254.65,"argument_of_periastron_deg":71.9},"designations":[{"catalog":"Exoplanet","designation":"TOI-1338 b"},{"catalog":"Host star","designation":"TOI-1338 A"}],"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."}