{"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":"2026-09-06T18:28:37.268Z","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":"hd-332231-b","name":"HD 332231 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":263.09893443087685,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":306.741134,"dec_deg":33.7443882,"epoch_ra_deg":307.004372,"epoch_dec_deg":33.832297,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 332231","semi_major_axis_km":21691691.251499996,"periapsis_km":null,"mass_kg":4.425376390033412e+26,"mass_msun":0.000222559,"constellation":"Cygnus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/hd-332231-b","radius_km":57868.712096204996,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 332231","host_v_mag":8.558,"eccentricity":0,"uncertainties":{"mass_kg":[3.2249706486073448e+25,3.3444140059631724e+25],"radius_km":[1118.351297659,1194.032301515],"distance_ly":[0.6223063686835464,0.6252417760829971],"host_mass_solar":[0.0337,0.0317],"inclination_deg":[0.28,0.22],"host_radius_solar":[0.0227,0.0235],"host_temperature_k":[80,87],"semi_major_axis_km":[448793.61209999997,448793.61209999997],"orbital_period_days":[0.000023,0.000023],"argument_of_periastron_deg":[50,50]},"host_mass_solar":1.1642,"inclination_deg":89.68,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.266,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F8","host_temperature_k":6128,"orbital_period_days":18.712024,"periastron_epoch_bjd":2458690.2,"transit_midpoint_bjd":2458692.2582,"equilibrium_temperature_k":798.3,"argument_of_periastron_deg":2},"designations":[{"catalog":"Exoplanet","designation":"HD 332231 b"},{"catalog":"Host star","designation":"HD 332231"}],"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."}