{"object":{"fullname":"76P/West-Kohoutek-Ikemura","kind":"cn","pha":false,"orbit_class":{"name":"Jupiter-family Comet","code":"JFc"},"des":"76P","orbit_id":"K264/2","prefix":"P","spkid":"1000104","neo":false},"phys_par":[{"units":null,"desc":"absolute magnitude of comet and coma (i.e. total)","ref":"K264/2","sigma":"0.7","value":"16.4","notes":"2 parameter fit from 451 observations, autocmod 3.0g","name":"M1","title":"comet total magnitude"},{"name":"K1","notes":"autocmod 3.0g","value":"7.","title":"comet total magnitude slope","sigma":null,"units":null,"ref":"K264/2","desc":"comet total magnitude slope parameter"},{"desc":"effective body diameter","ref":"Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver, H.A. (2004) Comets II, pp. 223-264","units":"km","sigma":null,"title":"diameter","value":"0.66","notes":null,"name":"diameter"}],"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"orbit":{"two_body":null,"t_jup":"2.685","pe_used":"DE441","n_dop_obs_used":null,"moid":"0.616","not_valid_before":null,"equinox":"J2000","sb_used":"SB441-N16","model_pars":[{"n":1,"sigma":"9.315E-11","title":"non-grav. radial accel.","value":"7.66e-10","name":"A1","kind":"EST","desc":"non-gravitational radial acceleration parameter","units":"au/d^2"},{"value":"-9.156e-11","name":"A2","title":"non-grav. transverse accel.","sigma":"2.144E-12","n":2,"units":"au/d^2","desc":"non-gravitational transverse acceleration parameter","kind":"EST"}],"data_arc":"7191","moid_jup":"0.0466","orbit_id":"K264/2","condition_code":"0","soln_date":"2026-05-29 11:31:18","epoch":"2456259.5","source":"JPL","last_obs":"2026-05-03","comment":null,"not_valid_after":null,"first_obs":"2006-08-25","cov_epoch":"2456259.5","rms":"0.83","n_del_obs_used":null,"elements":[{"value":"0.539","name":"e","units":null,"title":"eccentricity","label":"e","sigma":"1.4e-07"},{"label":"a","title":"semi-major axis","units":"au","name":"a","value":"3.47","sigma":"1.6e-07"},{"sigma":"4.7e-07","name":"q","value":"1.6","units":"au","label":"q","title":"perihelion distance"},{"sigma":"1.6e-05","name":"i","units":"deg","value":"30.5","label":"i","title":"inclination; angle with respect to x-y ecliptic plane"},{"title":"longitude of the ascending node","label":"node","name":"om","units":"deg","value":"84.1","sigma":"1.7e-05"},{"value":"0.0713","name":"w","units":"deg","label":"peri","title":"argument of perihelion","sigma":"7.5e-05"},{"name":"ma","units":"deg","value":"335","label":"M","title":"mean anomaly","sigma":"2.3e-05"},{"sigma":"0.00015","title":"time of perihelion passage","label":"tp","name":"tp","units":"TDB","value":"2456420.282"},{"title":"sidereal orbital period","label":"period","value":"2360","name":"per","units":"d","sigma":"0.00016"},{"sigma":"1.1e-08","title":"mean motion","label":"n","name":"n","value":"0.152","units":"deg/d"},{"sigma":"2.5e-07","title":"aphelion distance","label":"Q","name":"ad","value":"5.34","units":"au"}],"producer":"Shantanu Naidu","n_obs_used":963}}