{"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":"2026-08-31T23:34:45.661Z","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-565-b","name":"Kepler-565 b","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":3395.287892031299,"distance_method":"NASA Exoplanet Archive sy_dist (Morton+ 2016, 2016ApJ...822...86M)","ra_deg":283.6180825,"dec_deg":47.1967793,"epoch_ra_deg":283.804589,"epoch_dec_deg":47.229951,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-565","semi_major_axis_km":7494853.322069999,"periapsis_km":null,"mass_kg":7.704096549450879e+25,"mass_msun":0.000038745,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-565-b","radius_km":23216.284000000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-565","host_v_mag":15.231,"eccentricity":0,"uncertainties":{"radius_km":[1722.0870000000002,3252.831],"distance_ly":[267.22318182710507,470.1283259684683],"host_mass_solar":[0.055,0.043],"host_radius_solar":[0.07,0.132],"host_temperature_k":[75.3,80.65],"orbital_period_days":[0.000002931,0.000002931]},"host_mass_solar":0.98,"inclination_deg":89.82,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.95,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5735,"orbital_period_days":4.243747226,"transit_midpoint_bjd":2455006.563261,"equilibrium_temperature_k":1063},"designations":[{"catalog":"Exoplanet","designation":"Kepler-565 b"},{"catalog":"Host star","designation":"Kepler-565"}],"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."}