{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T07:25:59.222Z","years_from_j2000":26.674,"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-560-b","name":"Kepler-560 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":356.5150133546179,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":300.2066441,"dec_deg":45.0182402,"epoch_ra_deg":300.42026,"epoch_dec_deg":45.091724,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-560","semi_major_axis_km":13448848.575929997,"periapsis_km":null,"mass_kg":2.155952600272688e+25,"mass_msun":0.0000108426,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-560-b","radius_km":10970.332,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-560","host_v_mag":15.66,"eccentricity":0.17,"uncertainties":{"radius_km":[574.029,574.029],"distance_ly":[1.337241148638648,1.3470258399701502],"eccentricity":[0.04,0.07],"host_mass_solar":[0.021,0.021],"inclination_deg":[0.094,0.0031],"host_radius_solar":[0.018,0.016],"host_temperature_k":[23.6,30.41],"semi_major_axis_km":[927506.7983399999,463753.39916999993],"orbital_period_days":[0.00001517,0.00001517]},"host_mass_solar":0.34,"inclination_deg":89.606,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.33,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":3556,"orbital_period_days":18.47764449,"transit_midpoint_bjd":2455018.26856,"equilibrium_temperature_k":298},"designations":[{"catalog":"Exoplanet","designation":"Kepler-560 b"},{"catalog":"Host star","designation":"Kepler-560"}],"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."}