{"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"object":{"fullname":"58P/Jackson-Neujmin","kind":"cn","pha":false,"des":"58P","orbit_class":{"code":"JFc","name":"Jupiter-family Comet"},"neo":false,"orbit_id":"K204/6","spkid":"1000048","prefix":"P"},"orbit":{"source":"JPL","data_arc":"9317","equinox":"J2000","comment":"Nongrav. accels. using CO driven g(r)","pe_used":"DE441","t_jup":"2.567","n_dop_obs_used":null,"two_body":null,"not_valid_after":null,"condition_code":"3","first_obs":"1995-05-22","soln_date":"2025-08-20 10:51:01","not_valid_before":null,"cov_epoch":"2452996.5","orbit_id":"K204/6","n_obs_used":378,"last_obs":"2020-11-23","sb_used":"SB441-N16","epoch":"2452996.5","producer":"Davide Farnocchia","moid_jup":"0.295","elements":[{"units":null,"label":"e","title":"eccentricity","sigma":"3.2e-07","value":"0.661","name":"e"},{"units":"au","label":"a","sigma":"6.9e-06","title":"semi-major axis","value":"4.09","name":"a"},{"name":"q","value":"1.39","sigma":"1.3e-06","title":"perihelion distance","units":"au","label":"q"},{"name":"i","value":"13.5","sigma":"2.9e-05","title":"inclination; angle with respect to x-y ecliptic plane","label":"i","units":"deg"},{"name":"om","value":"161","sigma":"4.3e-05","title":"longitude of the ascending node","label":"node","units":"deg"},{"value":"200","name":"w","units":"deg","label":"peri","title":"argument of perihelion","sigma":"0.00013"},{"title":"mean anomaly","sigma":"0.0017","units":"deg","label":"M","name":"ma","value":"358"},{"units":"TDB","label":"tp","sigma":"0.014","title":"time of perihelion passage","value":"2453015.472","name":"tp"},{"value":"3020","name":"per","label":"period","units":"d","title":"sidereal orbital period","sigma":"0.0076"},{"value":"0.119","name":"n","label":"n","units":"deg/d","sigma":"3e-07","title":"mean motion"},{"value":"6.79","name":"ad","units":"au","label":"Q","sigma":"1.1e-05","title":"aphelion distance"}],"moid":"0.392","n_del_obs_used":null,"model_pars":[{"title":"non-grav. radial accel.","sigma":"2.195E-10","n":1,"kind":"EST","units":"au/d^2","desc":"non-gravitational radial acceleration parameter","name":"A1","value":"8.943e-09"},{"value":"-3.629e-10","name":"A2","kind":"EST","units":"au/d^2","desc":"non-gravitational transverse acceleration parameter","title":"non-grav. transverse accel.","sigma":"4.769E-11","n":2},{"value":"-3.815e-09","name":"A3","kind":"EST","desc":"non-gravitational normal acceleration parameter","units":"au/d^2","title":"non-grav. normal accel.","sigma":"1.112E-10","n":3},{"n":0,"sigma":null,"title":"normalizing factor","units":null,"desc":"normalizing factor [default 0.1112620426]","kind":"SET","name":"ALN","value":".0408373333128795"},{"n":0,"title":"non-grav. perihelion offset","sigma":null,"units":"d","desc":"non-gravitational perihelion-maximum offset","kind":"SET","name":"DT","value":"-10.78211821395645"},{"value":"2.6","name":"NK","kind":"SET","desc":"non-grav. model constant, exponent k [default 4.6142]","units":null,"sigma":null,"title":"non-grav. model exp. k","n":0},{"title":"non-grav. model exp. m","sigma":null,"n":0,"kind":"SET","desc":"non-grav. model constant, exponent m [default 2.15]","units":null,"name":"NM","value":"2."},{"kind":"SET","desc":"non-grav. model constant, exponent n [default 5.093]","units":null,"title":"non-grav. model exp. n","sigma":null,"n":0,"value":"3.","name":"NN"},{"title":"normalizing distance","sigma":null,"n":0,"kind":"SET","units":"au","desc":"normalizing distance, au [default 2.808 au]","name":"R0","value":"5."}],"rms":"0.88"},"phys_par":[{"value":"14.3","name":"M1","ref":"K204/6","desc":"absolute magnitude of comet and coma (i.e. total)","units":null,"notes":"2 parameter fit from 137 observations, autocmod 3.0f","sigma":"1.","title":"comet total magnitude"},{"name":"K1","ref":"K204/6","value":"12.75","title":"comet total magnitude slope","sigma":null,"notes":"autocmod 3.0f","units":null,"desc":"comet total magnitude slope parameter"},{"title":"comet nuclear magnitude","sigma":"1.","notes":"from 16 observations, autocmod 3.0f","desc":"absolute magnitude of comet nucleus","units":null,"name":"M2","ref":"K204/6","value":"17.8"},{"sigma":null,"title":"comet nuclear magnitude slope","units":null,"desc":"comet nuclear magnitude slope parameter","notes":"autocmod 3.0f","ref":"K204/6","name":"K2","value":"5."},{"value":"0.03","name":"PC","ref":"K204/6","notes":"autocmod 3.0f","units":null,"desc":"comet nuclear magnitude law phase coefficient","sigma":null,"title":"comet nuclear phase coefficient"}]}
