{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T18:49:35.921Z","years_from_j2000":26.665,"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-65-d","name":"Kepler-65 d","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":990.6282429115105,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":288.6887221,"dec_deg":41.1511076,"epoch_ra_deg":288.908292,"epoch_dec_deg":41.197071,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-65","semi_major_axis_km":12566221.138799999,"periapsis_km":null,"mass_kg":2.4724774972656308e+25,"mass_msun":0.0000124344,"constellation":"Lyra","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/kepler-65-d","radius_km":9694.712000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-65","host_v_mag":10.922,"eccentricity":0.014,"uncertainties":{"mass_kg":[4.7777342942331034e+24,4.7180126155551896e+24],"radius_km":[255.12400000000002,255.12400000000002],"distance_ly":[8.679021211042542,8.832314708569413],"eccentricity":[0.01,0.016],"host_mass_solar":[0.06,0.06],"inclination_deg":[0.16,0.18],"host_radius_solar":[0.03,0.03],"host_temperature_k":[66,66],"semi_major_axis_km":[299195.7414,897587.2241999999],"orbital_period_days":[0.00002,0.00002]},"host_mass_solar":1.25,"inclination_deg":92.35,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.41,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":6211,"orbital_period_days":8.13123,"transit_midpoint_bjd":2454970.9905,"equilibrium_temperature_k":1117},"designations":[{"catalog":"Exoplanet","designation":"Kepler-65 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."}