{"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":"2026-09-08T09:14:18.989Z","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-1448-b","name":"TOI-1448 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":239.18514881668523,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":316.324003,"dec_deg":57.7710946,"epoch_ra_deg":316.501694,"epoch_dec_deg":57.877856,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1448","semi_major_axis_km":8482199.26869,"periapsis_km":null,"mass_kg":1.164572734219319e+26,"mass_msun":0.000058568,"constellation":"Cepheus","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1448-b","radius_km":17533.396900000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1448","host_v_mag":15.678,"uncertainties":{"radius_km":[401.82030000000003,427.33270000000005],"distance_ly":[0.5622935951836656,0.5652290025831164],"host_mass_solar":[0.009,0.009],"inclination_deg":[0.26,0.26],"host_radius_solar":[0.007,0.007],"host_temperature_k":[32,28],"semi_major_axis_km":[224396.80604999998,224396.80604999998],"orbital_period_days":[0.000018,0.000018]},"host_mass_solar":0.372,"inclination_deg":89.62,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.38,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":3412,"orbital_period_days":8.112245,"transit_midpoint_bjd":2458713.3375,"eccentricity_upper_limit":0.36,"equilibrium_temperature_k":426},"designations":[{"catalog":"Exoplanet","designation":"TOI-1448 b"},{"catalog":"Host star","designation":"TOI-1448"}],"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."}