{"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":"2026-09-08T09:07:34.782Z","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-1221-b","name":"TOI-1221 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":451.43630396152173,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":107.9210254,"dec_deg":-65.5088568,"epoch_ra_deg":107.951003,"epoch_dec_deg":-65.552726,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1221","semi_major_axis_km":57894375.960899994,"periapsis_km":null,"mass_kg":6.643436099148521e+27,"mass_msun":0.00334108,"constellation":"Volans","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-1221-b","radius_km":18560.271,"radius_kind":null,"data_quality":"The published mass and radius imply a density no material has. One of the two is likely an upper limit rather than a measurement.","description":null,"properties":{"host_star":"TOI-1221","host_v_mag":10.494,"uncertainties":{"radius_km":[765.3720000000001,829.153],"distance_ly":[1.2589636179866297,1.262225181763797],"host_mass_solar":[0.22,0.22],"inclination_deg":[0.08,0.16],"host_radius_solar":[0.022,0.022],"host_temperature_k":[50,50],"semi_major_axis_km":[3440751.0260999994,3889544.6381999995],"orbital_period_days":[0.00041,0.00032]},"host_mass_solar":0.93,"inclination_deg":89.75,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.031,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5592,"orbital_period_days":91.68278,"transit_midpoint_bjd":2458404.1791,"eccentricity_upper_limit":0.21,"equilibrium_temperature_k":440},"designations":[{"catalog":"Exoplanet","designation":"TOI-1221 b"},{"catalog":"Host star","designation":"TOI-1221"}],"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."}