{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"des":"2P","orbit_class":{"code":"ETc","name":"Encke-type Comet"},"neo":true,"prefix":"P","orbit_id":"K273/22","fullname":"2P/Encke","pha":false,"kind":"cn","spkid":"1000025"},"orbit":{"producer":"Davide Farnocchia","moid_jup":"0.915","pe_used":"DE441","two_body":null,"cov_epoch":"2460291.5","not_valid_before":null,"first_obs":"2018-11-05","comment":null,"epoch":"2460291.5","equinox":"J2000","orbit_id":"K273/22","data_arc":"2895","moid":"0.166","n_del_obs_used":null,"condition_code":"2","last_obs":"2026-10-09","model_pars":[{"value":"1.402e-10","sigma":"5.373E-11","units":"au/d^2","desc":"non-gravitational radial acceleration parameter","kind":"EST","title":"non-grav. radial accel.","n":1,"name":"A1"},{"name":"A2","n":2,"title":"non-grav. transverse accel.","desc":"non-gravitational transverse acceleration parameter","kind":"EST","units":"au/d^2","sigma":"5.003E-13","value":"2.919e-12"}],"elements":[{"sigma":"1.7e-07","value":"0.847","units":null,"label":"e","title":"eccentricity","name":"e"},{"label":"a","title":"semi-major axis","sigma":"8.1e-07","value":"2.22","units":"au","name":"a"},{"label":"q","title":"perihelion distance","sigma":"4.6e-07","value":"0.34","units":"au","name":"q"},{"name":"i","value":"11.3","sigma":"1.6e-05","units":"deg","label":"i","title":"inclination; angle with respect to x-y ecliptic plane"},{"title":"longitude of the ascending node","label":"node","units":"deg","sigma":"5.5e-05","value":"334","name":"om"},{"name":"w","value":"187","sigma":"6e-05","units":"deg","label":"peri","title":"argument of perihelion"},{"name":"ma","title":"mean anomaly","label":"M","units":"deg","value":"15.4","sigma":"2.3e-05"},{"sigma":"5.8e-05","value":"2460240.028","units":"TDB","label":"tp","title":"time of perihelion passage","name":"tp"},{"label":"period","title":"sidereal orbital period","value":"1210","sigma":"0.00066","units":"d","name":"per"},{"name":"n","label":"n","title":"mean motion","value":"0.298","sigma":"1.6e-07","units":"deg/d"},{"title":"aphelion distance","label":"Q","units":"au","sigma":"1.5e-06","value":"4.1","name":"ad"}],"sb_used":"SB441-N16","source":"JPL","n_obs_used":1057,"t_jup":"3.026","n_dop_obs_used":null,"not_valid_after":null,"rms":"0.38","soln_date":"2026-10-09 14:41:02"}}