{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T15:02:40.931Z","years_from_j2000":26.667,"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":"kepler-46-d","name":"Kepler-46 d","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2534.430748685726,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.2687388,"dec_deg":42.6041819,"epoch_ra_deg":289.482238,"epoch_dec_deg":42.651584,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-46","semi_major_axis_km":10023057.3369,"periapsis_km":null,"mass_kg":1.988731899974529e+25,"mass_msun":0.0000100016,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-46-d","radius_km":10460.084,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-46","host_v_mag":15.312,"eccentricity":0,"uncertainties":{"radius_km":[5867.852000000001,5867.852000000001],"distance_ly":[53.792971376822486,56.128251041274375],"host_mass_solar":[0.025,0.02],"host_radius_solar":[0.441,0.441],"host_temperature_k":[200,200],"orbital_period_days":[0.000022,0.000022]},"host_mass_solar":0.883,"inclination_deg":88.51,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.79,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":5309,"orbital_period_days":6.766589,"transit_midpoint_bjd":2454971.05891,"equilibrium_temperature_k":845},"designations":[{"catalog":"Exoplanet","designation":"Kepler-46 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":"2026-08-30T09:56:50.739Z","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."}