{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T07:58:26.898Z","years_from_j2000":26.685,"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-880-c","name":"TOI-880 c","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":197.8722250768162,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":94.1644734,"dec_deg":-13.987337,"epoch_ra_deg":94.471549,"epoch_dec_deg":-13.996295,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-880","semi_major_axis_km":9499464.78945,"periapsis_km":null,"mass_kg":1.2959604273107292e+26,"mass_msun":0.0000651757,"constellation":"Canis Major","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-880-c","radius_km":31571.595,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-880","host_v_mag":10.104,"uncertainties":{"radius_km":[1275.6200000000001,1275.6200000000001],"distance_ly":[0.36464283028731914,0.3662736121759029],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.32,0.3],"host_radius_solar":[0.03,0.03],"host_temperature_k":[100,100],"semi_major_axis_km":[538552.3345199999,538552.3345199999],"orbital_period_days":[0.0000073,0.0000069]},"host_mass_solar":0.87,"inclination_deg":88.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.83,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K","host_temperature_k":5050,"orbital_period_days":6.3872703,"transit_midpoint_bjd":2459403.67511,"equilibrium_temperature_k":805},"designations":[{"catalog":"Exoplanet","designation":"TOI-880 c"},{"catalog":"Host star","designation":"TOI-880"}],"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."}