{"object":{"orbit_class":{"name":"Jupiter-family Comet","code":"JFc"},"spkid":"1000049","kind":"cn","neo":false,"orbit_id":"K253/37","des":"48P","pha":false,"prefix":"P","fullname":"48P/Johnson"},"discovery":{"citation":null,"who":"Johnson, Ernest Leonard","date":"1949-Aug-25","location":"Union Observatory, South Africa","ref":"comet.dis","cref":null,"site":null,"discovery":"Discovered 1949-08-25 by Johnson, Ernest Leonard at Union Observatory, South Africa","name":null},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"orbit":{"elements":[{"name":"e","value":"0.427","sigma":"1.3e-07","title":"eccentricity","label":"e","units":null},{"title":"semi-major axis","sigma":"1.9e-07","value":"3.5","name":"a","label":"a","units":"au"},{"units":"au","label":"q","name":"q","title":"perihelion distance","value":"2","sigma":"5.2e-07"},{"label":"i","units":"deg","name":"i","title":"inclination; angle with respect to x-y ecliptic plane","value":"12.2","sigma":"8.4e-06"},{"units":"deg","label":"node","name":"om","value":"110","sigma":"3.2e-05","title":"longitude of the ascending node"},{"value":"217","sigma":"5.4e-05","title":"argument of perihelion","name":"w","units":"deg","label":"peri"},{"units":"deg","label":"M","value":"33.4","sigma":"1.8e-05","title":"mean anomaly","name":"ma"},{"units":"TDB","label":"tp","title":"time of perihelion passage","sigma":"0.00011","value":"2458342.729","name":"tp"},{"label":"period","units":"d","title":"sidereal orbital period","sigma":"0.00019","value":"2390","name":"per"},{"name":"n","title":"mean motion","sigma":"1.2e-08","value":"0.151","label":"n","units":"deg/d"},{"label":"Q","units":"au","name":"ad","value":"4.99","sigma":"2.7e-07","title":"aphelion distance"}],"cov_epoch":"2458564.5","rms":"0.7","soln_date":"2026-07-07 05:51:27","moid_jup":"0.56","model_pars":[{"desc":"non-gravitational radial acceleration parameter","n":1,"name":"A1","value":"8.061e-09","sigma":"2.133E-10","title":"non-grav. radial accel.","kind":"EST","units":"au/d^2"},{"units":"au/d^2","kind":"EST","name":"A2","n":2,"title":"non-grav. transverse accel.","value":"6.266e-10","sigma":"3.92E-11","desc":"non-gravitational transverse acceleration parameter"},{"units":"au/d^2","kind":"EST","title":"non-grav. normal accel.","value":"3.637e-10","sigma":"1.158E-10","n":3,"name":"A3","desc":"non-gravitational normal acceleration parameter"},{"value":"-77.2","sigma":"3.762","title":"non-grav. perihelion offset","name":"DT","n":4,"desc":"non-gravitational perihelion-maximum offset","units":"d","kind":"EST"}],"not_valid_after":null,"epoch":"2458564.5","two_body":null,"not_valid_before":null,"data_arc":"5700","first_obs":"2010-07-09","producer":"Davide Farnocchia","last_obs":"2026-02-15","source":"JPL","condition_code":"0","t_jup":"2.937","pe_used":"DE441","n_del_obs_used":null,"n_dop_obs_used":null,"n_obs_used":2212,"moid":"1.01","equinox":"J2000","orbit_id":"K253/37","sb_used":"SB441-N16","comment":null}}