{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T22:28:08.488Z","years_from_j2000":26.682,"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-220-b","name":"TOI-220 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":295.9549494529284,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":91.7996988,"dec_deg":-61.9972098,"epoch_ra_deg":91.862655,"epoch_dec_deg":-61.999695,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-220","semi_major_axis_km":13330666.258076997,"periapsis_km":null,"mass_kg":8.241591657552103e+25,"mass_msun":0.0000414482,"constellation":"Pictor","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-220-b","radius_km":19325.643,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-220","host_v_mag":10.466,"eccentricity":0.032,"uncertainties":{"mass_kg":[5.972167867791379e+24,5.972167867791379e+24],"radius_km":[956.715,956.715],"distance_ly":[0.5574012495179145,0.559358187784215],"eccentricity":[0.023,0.038],"host_mass_solar":[0.028,0.028],"inclination_deg":[0.12,0.12],"host_radius_solar":[0.032,0.032],"host_temperature_k":[65,65],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.000086,0.000086],"argument_of_periastron_deg":[190,66]},"host_mass_solar":0.825,"inclination_deg":87.88,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.858,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K0 V","host_temperature_k":5298,"orbital_period_days":10.695264,"transit_midpoint_bjd":2458335.902,"equilibrium_temperature_k":805,"argument_of_periastron_deg":248},"designations":[{"catalog":"Exoplanet","designation":"TOI-220 b"},{"catalog":"Host star","designation":"TOI-220"}],"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."}