{"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":"2026-09-01T18:33:56.699Z","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-139-e","name":"Kepler-139 e","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1275.395376295999,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":282.3919451,"dec_deg":43.8894167,"epoch_ra_deg":282.595005,"epoch_dec_deg":43.919492,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-139","semi_major_axis_km":484068249.96274674,"periapsis_km":null,"mass_kg":2.2574794540251413e+27,"mass_msun":0.00113532,"constellation":"Lyra","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/kepler-139-e","radius_km":87379.97,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-139","host_v_mag":12.775,"eccentricity":0.013121,"uncertainties":{"mass_kg":[2.329145468438638e+26,2.866640576539862e+26],"distance_ly":[13.532228111467685,13.822507287635588],"eccentricity":[0.046302,0.046302],"host_mass_solar":[0.0255,0.0255],"host_radius_solar":[0.025,0.026],"host_temperature_k":[53,53],"orbital_period_days":[65.623783,65.623783]},"host_mass_solar":1.078,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.045,"planets_in_system":5,"discovery_facility":"W. M. Keck Observatory","host_temperature_k":5622,"orbital_period_days":2047.635373,"equilibrium_temperature_k":154.06},"designations":[{"catalog":"Exoplanet","designation":"Kepler-139 e"},{"catalog":"Host star","designation":"Kepler-139"}],"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."}