{"orbit":{"last_obs":"2026-04-13","not_valid_after":null,"model_pars":[],"sb_used":"SB441-N16","rms":"0.34","cov_epoch":"2458020.5","orbit_id":"144","moid":"1.41","pe_used":"DE441","producer":"Otto Matic","source":"JPL","first_obs":"1872-11-26","n_obs_used":6817,"two_body":null,"data_arc":"56020","n_dop_obs_used":null,"equinox":"J2000","epoch":"2461200.5","moid_jup":"2.37","comment":null,"not_valid_before":null,"t_jup":"3.326","elements":[{"units":null,"label":"e","name":"e","value":"0.127","title":"eccentricity","sigma":"2.1e-09"},{"title":"semi-major axis","value":"2.75","name":"a","sigma":"2.5e-09","units":"au","label":"a"},{"title":"perihelion distance","name":"q","value":"2.4","sigma":"6.6e-09","units":"au","label":"q"},{"title":"inclination; angle with respect to x-y ecliptic plane","name":"i","value":"6.25","sigma":"1.6e-07","units":"deg","label":"i"},{"title":"longitude of the ascending node","value":"76.2","name":"om","sigma":"1.8e-06","units":"deg","label":"node"},{"title":"argument of perihelion","name":"w","value":"303","sigma":"2.1e-06","units":"deg","label":"peri"},{"label":"M","units":"deg","sigma":"8.8e-07","name":"ma","value":"275","title":"mean anomaly"},{"sigma":"4.3e-06","title":"time of perihelion passage","name":"tp","value":"2461593.185","label":"tp","units":"TDB"},{"units":"d","label":"period","name":"per","value":"1670","title":"sidereal orbital period","sigma":"2.3e-06"},{"label":"n","units":"deg/d","sigma":"3e-10","title":"mean motion","value":"0.216","name":"n"},{"sigma":"2.8e-09","title":"aphelion distance","name":"ad","value":"3.1","label":"Q","units":"au"}],"n_del_obs_used":null,"condition_code":"0","soln_date":"2026-06-05 03:11:08"},"object":{"shortname":"128 Nemesis","pha":false,"spkid":"20000128","prefix":null,"des":"128","neo":false,"fullname":"128 Nemesis (A872 WA)","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"kind":"an","orbit_id":"144"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"discovery":{"date":"1872-Nov-25","who":"Watson, J. C.","ref":"DISCOVERY.DB","site":null,"citation":null,"location":"Ann Arbor","cref":null,"name":null,"discovery":"Discovered 1872-11-25 by Watson, J. C. at Ann Arbor"}}
