{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T22:44:44.799Z","years_from_j2000":26.682,"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-431-d","name":"TOI-431 d","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":106.22456603305531,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":83.2692502,"dec_deg":-26.7238698,"epoch_ra_deg":83.538839,"epoch_dec_deg":-26.704409,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-431","semi_major_axis_km":14660591.328599999,"periapsis_km":null,"mass_kg":5.912446189113466e+25,"mass_msun":0.0000297345,"constellation":"Lepus","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-431-d","radius_km":20983.949,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-431","host_v_mag":9.12,"eccentricity":0,"uncertainties":{"mass_kg":[8.898530123009155e+24,9.13741683772081e+24],"radius_km":[574.029,574.029],"distance_ly":[0.1014346334699072,0.10176078984762395],"host_mass_solar":[0.07,0.07],"inclination_deg":[0.2,0.2],"host_radius_solar":[0.022,0.022],"host_temperature_k":[75,75],"semi_major_axis_km":[299195.7414,299195.7414],"orbital_period_days":[0.00002,0.00002]},"host_mass_solar":0.78,"inclination_deg":89.7,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.731,"planets_in_system":3,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":4850,"orbital_period_days":12.46103,"transit_midpoint_bjd":2458627.5453,"equilibrium_temperature_k":633,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"TOI-431 d"}],"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."}