{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T23:02:12.191Z","years_from_j2000":26.673,"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-114-d","name":"Kepler-114 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":846.4834317795958,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":294.121482,"dec_deg":48.3497977,"epoch_ra_deg":294.311038,"epoch_dec_deg":48.409029,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-114","semi_major_axis_km":12503390.033106,"periapsis_km":null,"mass_kg":2.3291454684386377e+25,"mass_msun":0.0000117136,"constellation":"Cygnus","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/kepler-114-d","radius_km":16136.592999999999,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-114","host_v_mag":13.961,"eccentricity":0,"uncertainties":{"mass_kg":[1.0152685375245345e+25,1.0152685375245345e+25],"radius_km":[1785.8680000000002,1785.8680000000002],"distance_ly":[4.2677562024235876,4.2677562024235876],"host_mass_solar":[0.06,0.06],"host_radius_solar":[0.06,0.06],"host_temperature_k":[48.94,56.23],"semi_major_axis_km":[453281.548221,453281.548221]},"host_mass_solar":0.56,"inclination_deg":88.87,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.54,"planets_in_system":3,"discovery_facility":"Kepler","host_spectral_type":"M0 V","host_temperature_k":4660,"orbital_period_days":11.776,"transit_midpoint_bjd":2454975.7057,"equilibrium_temperature_k":446},"designations":[{"catalog":"Exoplanet","designation":"Kepler-114 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."}