{"orbit":{"comment":null,"n_obs_used":16,"moid_jup":null,"model_pars":[],"pe_used":"DE405","data_arc":"2584","not_valid_after":null,"cov_epoch":"2440240.5","sb_used":"SB405-CPV-2","t_jup":"2.669","condition_code":"1","not_valid_before":null,"producer":"M.S.W. Keesey","epoch":"2440240.5","soln_date":"2002-02-22 17:02:43","rms":"1.7","n_dop_obs_used":null,"moid":"0.289","n_del_obs_used":null,"first_obs":"1961-11-29","elements":[{"sigma":"7.6e-07","value":"0.643","units":null,"name":"e","title":"eccentricity","label":"e"},{"units":"au","name":"a","label":"a","title":"semi-major axis","sigma":"4.1e-07","value":"3.56"},{"units":"au","name":"q","title":"perihelion distance","label":"q","sigma":"2.6e-06","value":"1.27"},{"title":"inclination; angle with respect to x-y ecliptic plane","label":"i","name":"i","units":"deg","value":"17.8","sigma":"0.00012"},{"value":"241","sigma":"0.00012","name":"om","units":"deg","label":"node","title":"longitude of the ascending node"},{"name":"w","units":"deg","label":"peri","title":"argument of perihelion","sigma":"0.00037","value":"166"},{"value":"11.5","sigma":"6.3e-05","name":"ma","units":"deg","label":"M","title":"mean anomaly"},{"title":"time of perihelion passage","label":"tp","name":"tp","units":"TDB","value":"2440162.042","sigma":"0.00043"},{"title":"sidereal orbital period","label":"period","units":"d","name":"per","value":"2450","sigma":"0.00042"},{"value":"0.147","sigma":"2.5e-08","title":"mean motion","label":"n","name":"n","units":"deg/d"},{"value":"5.85","sigma":"6.7e-07","name":"ad","units":"au","label":"Q","title":"aphelion distance"}],"equinox":"J2000","two_body":null,"source":"JPL","last_obs":"1968-12-26","orbit_id":"J682/18"},"phys_par":[{"notes":null,"value":"11.5","desc":"absolute magnitude of comet and coma (i.e. total)","name":"M1","units":null,"sigma":null,"ref":"ICQ 2002 Handbook","title":"comet total magnitude"},{"title":"comet total magnitude slope","ref":"ICQ 2002 Handbook","sigma":null,"units":null,"name":"K1","desc":"comet total magnitude slope parameter","value":"20.0","notes":null},{"notes":null,"value":"15.5","desc":"absolute magnitude of comet nucleus","units":null,"name":"M2","ref":"ICQ 2002 Handbook","sigma":null,"title":"comet nuclear magnitude"},{"title":"comet nuclear magnitude slope","ref":"ICQ 2002 Handbook","sigma":null,"units":null,"name":"K2","desc":"comet nuclear magnitude slope parameter","value":"15.0","notes":null}],"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"neo":true,"spkid":"1000144","des":"18D","orbit_class":{"name":"Jupiter-family Comet","code":"JFc"},"orbit_id":"J682/18","fullname":"18D/Perrine-Mrkos","prefix":"D","kind":"cn","pha":false}}