{"object":{"fullname":"283 Emma (A889 CA)","shortname":"283 Emma","kind":"an","pha":false,"des":"283","orbit_class":{"code":"MBA","name":"Main-belt Asteroid"},"neo":false,"orbit_id":"123","spkid":"20000283","prefix":null},"orbit":{"soln_date":"2026-06-05 03:24:16","cov_epoch":"2456903.5","not_valid_before":null,"last_obs":"2026-03-28","n_obs_used":9231,"orbit_id":"123","epoch":"2461200.5","sb_used":"SB441-N16","producer":"Otto Matic","moid_jup":"1.99","elements":[{"units":null,"label":"e","sigma":"1.9e-09","title":"eccentricity","value":"0.144","name":"e"},{"name":"a","value":"3.05","sigma":"2e-09","title":"semi-major axis","label":"a","units":"au"},{"name":"q","value":"2.61","sigma":"7e-09","title":"perihelion distance","label":"q","units":"au"},{"units":"deg","label":"i","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"1.2e-07","value":"7.99","name":"i"},{"title":"longitude of the ascending node","sigma":"8.9e-07","units":"deg","label":"node","name":"om","value":"304"},{"label":"peri","units":"deg","title":"argument of perihelion","sigma":"1.1e-06","value":"56.1","name":"w"},{"label":"M","units":"deg","sigma":"8.4e-07","title":"mean anomaly","value":"71.2","name":"ma"},{"units":"TDB","label":"tp","title":"time of perihelion passage","sigma":"4.2e-06","value":"2460815.926","name":"tp"},{"name":"per","value":"1940","title":"sidereal orbital period","sigma":"1.9e-06","units":"d","label":"period"},{"name":"n","value":"0.185","title":"mean motion","sigma":"1.8e-10","label":"n","units":"deg/d"},{"name":"ad","value":"3.49","sigma":"2.3e-09","title":"aphelion distance","label":"Q","units":"au"}],"model_pars":[],"rms":"0.28","n_del_obs_used":null,"moid":"1.62","data_arc":"50043","source":"JPL","equinox":"J2000","comment":null,"pe_used":"DE441","t_jup":"3.207","n_dop_obs_used":null,"two_body":null,"not_valid_after":null,"condition_code":"0","first_obs":"1889-03-23"},"discovery":{"who":"Charlois, A.","date":"1889-Feb-08","location":"Nice","site":null,"citation":null,"ref":"DISCOVERY.DB","name":null,"discovery":"Discovered 1889-02-08 by Charlois, A. at Nice","cref":null},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"}}