{"discovery":{"ref":"DISCOVERY.DB","location":"Palomar","date":"1979-Nov-22","citation":null,"cref":null,"site":null,"discovery":"Discovered 1979-11-22 by Kowal, C. at Palomar","who":"Kowal, C.","name":null},"orbit":{"orbit_id":"106","source":"JPL","last_obs":"2026-02-28","two_body":null,"first_obs":"1950-06-19","elements":[{"units":null,"name":"e","title":"eccentricity","label":"e","sigma":"2.6e-09","value":"0.0671"},{"title":"semi-major axis","label":"a","name":"a","units":"au","value":"5.17","sigma":"2.5e-08"},{"units":"au","name":"q","title":"perihelion distance","label":"q","sigma":"1.9e-08","value":"4.82"},{"name":"i","units":"deg","label":"i","title":"inclination; angle with respect to x-y ecliptic plane","sigma":"9e-08","value":"16.6"},{"sigma":"2.1e-07","value":"268","title":"longitude of the ascending node","label":"node","units":"deg","name":"om"},{"units":"deg","name":"w","title":"argument of perihelion","label":"peri","sigma":"4e-06","value":"292"},{"name":"ma","units":"deg","title":"mean anomaly","label":"M","value":"205","sigma":"2e-06"},{"name":"tp","units":"TDB","title":"time of perihelion passage","label":"tp","value":"2463044.439","sigma":"1.3e-05"},{"title":"sidereal orbital period","label":"period","units":"d","name":"per","sigma":"3.1e-05","value":"4290"},{"sigma":"6.2e-10","value":"0.0839","name":"n","units":"deg/d","title":"mean motion","label":"n"},{"label":"Q","title":"aphelion distance","units":"au","name":"ad","value":"5.51","sigma":"2.7e-08"}],"equinox":"J2000","n_del_obs_used":null,"moid":"3.86","n_dop_obs_used":null,"rms":"0.3","soln_date":"2026-06-05 06:19:58","producer":"Otto Matic","epoch":"2461200.5","not_valid_before":null,"condition_code":"0","t_jup":"2.912","sb_used":"SB441-N16","not_valid_after":null,"cov_epoch":"2458651.5","data_arc":"27648","pe_used":"DE441","model_pars":[],"moid_jup":"0.137","comment":null,"n_obs_used":6277},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"fullname":"2241 Alcathous (1979 WM)","orbit_id":"106","orbit_class":{"code":"TJN","name":"Jupiter Trojan"},"shortname":"2241 Alcathous","des":"2241","spkid":"20002241","neo":false,"pha":false,"prefix":null,"kind":"an"}}