{"object":{"shortname":"532 Herculina","orbit_class":{"name":"Main-belt Asteroid","code":"MBA"},"orbit_id":"139","fullname":"532 Herculina (A904 HE)","neo":false,"spkid":"20000532","des":"532","kind":"an","prefix":null,"pha":false},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"orbit":{"condition_code":"0","t_jup":"3.256","sb_used":"SB441-N16","pe_used":"DE441","model_pars":[],"cov_epoch":"2457760.5","not_valid_after":null,"data_arc":"44440","n_obs_used":5497,"comment":null,"moid_jup":"1.96","orbit_id":"139","last_obs":"2025-12-21","source":"JPL","equinox":"J2000","first_obs":"1904-04-20","elements":[{"title":"eccentricity","label":"e","name":"e","units":null,"sigma":"3.5e-09","value":"0.18"},{"name":"a","units":"au","label":"a","title":"semi-major axis","value":"2.77","sigma":"1.9e-09"},{"title":"perihelion distance","label":"q","units":"au","name":"q","value":"2.27","sigma":"1e-08"},{"units":"deg","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","label":"i","value":"16.3","sigma":"3.1e-07"},{"title":"longitude of the ascending node","label":"node","units":"deg","name":"om","value":"107","sigma":"1.2e-06"},{"title":"argument of perihelion","label":"peri","name":"w","units":"deg","value":"76.7","sigma":"1.5e-06"},{"units":"deg","name":"ma","title":"mean anomaly","label":"M","sigma":"1.3e-06","value":"179"},{"sigma":"5.5e-06","value":"2460362.247","title":"time of perihelion passage","label":"tp","name":"tp","units":"TDB"},{"value":"1680","sigma":"1.8e-06","units":"d","name":"per","title":"sidereal orbital period","label":"period"},{"units":"deg/d","name":"n","title":"mean motion","label":"n","sigma":"2.2e-10","value":"0.214"},{"value":"3.27","sigma":"2.3e-09","units":"au","name":"ad","label":"Q","title":"aphelion distance"}],"n_del_obs_used":null,"two_body":null,"n_dop_obs_used":null,"rms":"0.43","moid":"1.34","epoch":"2461200.5","producer":"Otto Matic","not_valid_before":null,"soln_date":"2026-03-11 21:55:23"},"discovery":{"discovery":"Discovered 1904-04-20 by Wolf, M. at Heidelberg","name":null,"who":"Wolf, M.","cref":null,"site":null,"citation":null,"date":"1904-Apr-20","ref":"DISCOVERY.DB","location":"Heidelberg"}}