{"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":"2026-09-07T07:23:06.870Z","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-411-c","name":"TOI-411 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":204.7583646795498,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":54.819538,"dec_deg":-42.7630276,"epoch_ra_deg":55.051954,"epoch_dec_deg":-42.675215,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 22946","semi_major_axis_km":15214103.450189998,"periapsis_km":null,"mass_kg":5.804947167493221e+25,"mass_msun":0.0000291939,"constellation":"Eridanus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-411-c","radius_km":14848.2168,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 22946","host_v_mag":8.270001,"eccentricity":0.16,"uncertainties":{"radius_km":[248.7459,242.36780000000002],"distance_ly":[0.37703677264055535,0.3786675545291391],"eccentricity":[0.1,0.17],"host_mass_solar":[0.039,0.04],"inclination_deg":[0.53,0.86],"host_radius_solar":[0.009,0.009],"host_temperature_k":[64,64],"semi_major_axis_km":[209437.01898,224396.80604999998],"orbital_period_days":[0.000014,0.000014],"argument_of_periastron_deg":[140,130]},"host_mass_solar":1.098,"inclination_deg":88.57,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.117,"planets_in_system":3,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F7/F8V","host_temperature_k":6169,"orbital_period_days":9.573083,"transit_midpoint_bjd":2459161.60861,"equilibrium_temperature_k":931,"argument_of_periastron_deg":10},"designations":[{"catalog":"Exoplanet","designation":"TOI-411 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."}