{"id":11095,"slug":"europa","name":"Europa","domain":"solar-system","class":"moon","otype":null,"otype_label":"Natural satellite","ra":null,"dec":null,"coo_err_mas":null,"coo_bibcode":null,"plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":null,"vmag":null,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":0,"simbad_oid":null,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":1,"deep_at":"2026-08-14T16:44:00.521972+00:00","views":16,"first_seen":"2026-08-14T16:26:31.571671+00:00","updated_at":"2026-08-14T16:26:31.571671+00:00","identifiers":["Horizons 502","JII"],"measurements":[{"parameter":"density","value":3.013,"value_text":"3.013 +- 0.005","unit":"g cm^-3","err_plus":null,"err_minus":null,"band":null,"method":"Density (g cm^-3)","source":"horizons","reference":"JPL Horizons on-line ephemeris system","ref_year":null},{"parameter":"geometric_albedo","value":0.67,"value_text":"0.67 +/- 0.03","unit":null,"err_plus":null,"err_minus":null,"band":null,"method":"Geometric Albedo","source":"horizons","reference":"JPL Horizons on-line ephemeris system","ref_year":null},{"parameter":"jpl:rotational_period","value":null,"value_text":"Synchronous","unit":null,"err_plus":null,"err_minus":null,"band":null,"method":"Rotational period","source":"horizons","reference":"JPL Horizons on-line ephemeris system","ref_year":null},{"parameter":"mean_radius","value":1560.8,"value_text":"1560.8   +- 0.3","unit":"km","err_plus":null,"err_minus":null,"band":null,"method":"Mean radius (km)","source":"horizons","reference":"JPL Horizons on-line ephemeris system","ref_year":null}],"orbit":null,"exoplanet":null,"sources":[{"source":"horizons","url":"https://ssd.jpl.nasa.gov/horizons/app.html#/?sstr=502","fetched_at":"2026-08-14T17:08:21.949288+00:00"}]}