{"orbit":{"not_valid_before":null,"n_obs_used":7370,"n_del_obs_used":20,"source":"JPL","first_obs":"2004-03-15","two_body":null,"elements":[{"label":"e","title":"eccentricity","sigma":"1.8e-09","value":"0.191","name":"e","units":null},{"units":"au","name":"a","value":"0.922","title":"semi-major axis","sigma":"1.6e-09","label":"a"},{"label":"q","title":"perihelion distance","value":"0.746","sigma":"2.9e-09","name":"q","units":"au"},{"name":"i","units":"deg","label":"i","value":"3.34","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"9.9e-08"},{"units":"deg","name":"om","sigma":"3.1e-06","value":"204","title":"longitude of the ascending node","label":"node"},{"name":"w","units":"deg","label":"peri","value":"127","sigma":"3.3e-06","title":"argument of perihelion"},{"label":"M","value":"175","sigma":"5.3e-07","title":"mean anomaly","name":"ma","units":"deg"},{"label":"tp","sigma":"7.1e-07","value":"2461042.919","title":"time of perihelion passage","name":"tp","units":"TDB"},{"value":"324","sigma":"8.2e-07","title":"sidereal orbital period","label":"period","units":"d","name":"per"},{"name":"n","units":"deg/d","label":"n","title":"mean motion","value":"1.11","sigma":"2.8e-09"},{"units":"au","name":"ad","title":"aphelion distance","value":"1.1","sigma":"1.9e-09","label":"Q"}],"equinox":"J2000","moid_jup":"4.12","orbit_id":"220","data_arc":"6599","cov_epoch":"2459215.5","rms":"0.26","soln_date":"2024-06-25 10:48:08","producer":"Davide Farnocchia","t_jup":"6.466","epoch":"2461200.5","condition_code":"0","not_valid_after":null,"moid":"0.000108","model_pars":[{"kind":"EST","units":"au/d^2","name":"A1","desc":"non-gravitational radial acceleration parameter","value":"5e-13","sigma":"4.892E-13","title":"non-grav. radial accel.","n":1},{"desc":"non-gravitational transverse acceleration parameter","value":"-2.902e-14","sigma":"1.859E-16","title":"non-grav. transverse accel.","n":2,"units":"au/d^2","kind":"EST","name":"A2"},{"n":0,"desc":"normalizing factor [default 0.1112620426]","sigma":null,"title":"normalizing factor","value":"1.","name":"ALN","units":null,"kind":"SET"},{"units":null,"kind":"SET","name":"NK","sigma":null,"title":"non-grav. model exp. k","value":"0.","desc":"non-grav. model constant, exponent k [default 4.6142]","n":0},{"sigma":null,"value":"2.","title":"non-grav. model exp. m","desc":"non-grav. model constant, exponent m [default 2.15]","n":0,"kind":"SET","units":null,"name":"NM"},{"n":0,"desc":"normalizing distance, au [default 2.808 au]","title":"normalizing distance","sigma":null,"value":"1.","name":"R0","units":"au","kind":"SET"}],"last_obs":"2022-04-09","n_dop_obs_used":30,"pe_used":"DE441","sb_used":"SB441-N16","comment":null},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"spkid":"20099942","shortname":"99942 Apophis","neo":true,"prefix":null,"orbit_id":"220","fullname":"99942 Apophis (2004 MN4)","des":"99942","orbit_class":{"name":"Aten","code":"ATE"},"kind":"an","pha":true}}