{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T10:22:59.511Z","years_from_j2000":26.677,"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-2407-b","name":"TOI-2407 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":301.48786624451526,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":49.746545,"dec_deg":-46.458025,"epoch_ra_deg":49.972165,"epoch_dec_deg":-46.359877,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2407","semi_major_axis_km":4936729.7331,"periapsis_km":null,"mass_kg":1.0033242017889517e+26,"mass_msun":0.0000504586,"constellation":"Horologium","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-2407-b","radius_km":27170.706000000002,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2407","host_v_mag":14.68,"eccentricity":0.08,"uncertainties":{"radius_km":[1658.306,1658.306],"distance_ly":[0.6692728870747575,0.6722082944742082],"eccentricity":[0.04,0.07],"host_mass_solar":[0.016,0.016],"inclination_deg":[0.41,0.55],"host_radius_solar":[0.034,0.034],"host_temperature_k":[100,100],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.000001,0.000001],"argument_of_periastron_deg":[30,32]},"host_mass_solar":0.548,"inclination_deg":88.83,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.567,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":3530,"orbital_period_days":2.702969,"transit_midpoint_bjd":2459149.0561,"equilibrium_temperature_k":705,"argument_of_periastron_deg":42},"designations":[{"catalog":"Exoplanet","designation":"TOI-2407 b"},{"catalog":"Host star","designation":"TOI-2407"}],"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."}