{"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":"2026-09-08T16:25:26.989Z","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-2458-c","name":"TOI-2458 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":368.419721141279,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":79.621529,"dec_deg":1.253439,"epoch_ra_deg":79.969079,"epoch_dec_deg":1.282222,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2458","semi_major_axis_km":19298125.320299998,"periapsis_km":null,"mass_kg":6.10355556088279e+25,"mass_msun":0.0000306957,"constellation":"Orion","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-2458-c","radius_km":20282.358000000004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2458","host_v_mag":9.202,"eccentricity":0.29,"uncertainties":{"mass_kg":[1.134711894880362e+25,1.0212407053923257e+25],"distance_ly":[1.7449366207845773,1.7612444396704146],"eccentricity":[0.16,0.16],"host_mass_solar":[0.03,0.03],"host_radius_solar":[0.03,0.03],"host_temperature_k":[50,50],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.061,0.059],"argument_of_periastron_deg":[41.1,48.1]},"host_mass_solar":1.05,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.31,"planets_in_system":2,"discovery_facility":"La Silla Observatory","host_spectral_type":"F9-F9.5","host_temperature_k":6005,"orbital_period_days":16.553,"periastron_epoch_bjd":2459168.39,"equilibrium_temperature_k":922.76,"argument_of_periastron_deg":4.3},"designations":[{"catalog":"Exoplanet","designation":"TOI-2458 c"}],"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."}