{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T10:55:56.110Z","years_from_j2000":26.686,"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-3523-a-b","name":"TOI-3523 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2104.667536023482,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":304.2834581,"dec_deg":42.9065338,"epoch_ra_deg":304.511638,"epoch_dec_deg":42.989137,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-3523 A","semi_major_axis_km":5324188.218212999,"periapsis_km":null,"mass_kg":2.6004307016667073e+27,"mass_msun":0.00130779,"constellation":"Cygnus","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-3523-a-b","radius_km":101876.09973475001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-3523 A","host_v_mag":12.56,"uncertainties":{"mass_kg":[2.0879370597323927e+26,2.2777495197080647e+26],"radius_km":[2502.2199643920003,2645.204018849],"distance_ly":[75.93246629623503,81.72826512826157],"host_mass_solar":[0.078,0.074],"inclination_deg":[1,1.1],"host_radius_solar":[0.035,0.035],"host_temperature_k":[110,110],"semi_major_axis_km":[125662.211388,113694.381732],"orbital_period_days":[8.2e-7,8.2e-7]},"host_mass_solar":1.131,"inclination_deg":88.3,"stars_in_system":3,"discovery_method":"Transit","host_radius_solar":1.448,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6450,"orbital_period_days":2.30458952,"transit_midpoint_bjd":2460417.45562,"eccentricity_upper_limit":0.047,"equilibrium_temperature_k":1984},"designations":[{"catalog":"Exoplanet","designation":"TOI-3523 A b"},{"catalog":"Host star","designation":"TOI-3523 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."}