{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T12:55:56.768Z","years_from_j2000":26.683,"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-1478-b","name":"TOI-1478 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":498.66700901868336,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":126.4337428,"dec_deg":-13.5595485,"epoch_ra_deg":126.748606,"epoch_dec_deg":-13.646865,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1478","semi_major_axis_km":12237105.823259998,"periapsis_km":null,"mass_kg":1.6703496477859142e+27,"mass_msun":0.000840043,"constellation":"Puppis","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1478-b","radius_km":76496.439795235,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1478","host_v_mag":10.723,"eccentricity":0.055,"uncertainties":{"mass_kg":[2.2777495197080647e+26,2.0879370597323927e+26],"radius_km":[7149.199980267,11438.719955671],"distance_ly":[2.951715218336528,2.9843308561082025],"eccentricity":[0.032,0.032],"host_mass_solar":[0.041,0.059],"inclination_deg":[0.25,0.25],"host_radius_solar":[0.029,0.03],"host_temperature_k":[82,83],"semi_major_axis_km":[1271581.90095,1944772.3190999997],"orbital_period_days":[0.0000071,0.0000071],"argument_of_periastron_deg":[20,26]},"host_mass_solar":0.947,"inclination_deg":87.63,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.048,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5597,"orbital_period_days":10.1802117,"transit_midpoint_bjd":2459066.0187,"equilibrium_temperature_k":918,"argument_of_periastron_deg":94},"designations":[{"catalog":"Exoplanet","designation":"TOI-1478 b"},{"catalog":"Host star","designation":"TOI-1478"}],"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."}