{"orbit":{"last_obs":"2025-05-02","source":"JPL","orbit_id":"K244/33","two_body":null,"n_del_obs_used":null,"equinox":"J2000","first_obs":"1999-08-03","elements":[{"name":"e","units":null,"label":"e","title":"eccentricity","sigma":"1.5e-07","value":"0.531"},{"sigma":"1.2e-07","value":"4.09","name":"a","units":"au","label":"a","title":"semi-major axis"},{"title":"perihelion distance","label":"q","units":"au","name":"q","sigma":"6.5e-07","value":"1.92"},{"title":"inclination; angle with respect to x-y ecliptic plane","label":"i","name":"i","units":"deg","sigma":"8.1e-06","value":"19.2"},{"units":"deg","name":"om","title":"longitude of the ascending node","label":"node","sigma":"2.1e-05","value":"355"},{"name":"w","units":"deg","title":"argument of perihelion","label":"peri","value":"49","sigma":"6e-05"},{"value":"159","sigma":"2e-05","label":"M","title":"mean anomaly","units":"deg","name":"ma"},{"sigma":"0.00012","value":"2454407.322","units":"TDB","name":"tp","label":"tp","title":"time of perihelion passage"},{"sigma":"0.00013","value":"3020","units":"d","name":"per","title":"sidereal orbital period","label":"period"},{"label":"n","title":"mean motion","name":"n","units":"deg/d","sigma":"5.2e-09","value":"0.119"},{"sigma":"1.8e-07","value":"6.26","units":"au","name":"ad","label":"Q","title":"aphelion distance"}],"moid":"0.976","rms":"0.69","n_dop_obs_used":null,"soln_date":"2025-10-01 16:07:23","not_valid_before":null,"epoch":"2455743.5","producer":"Shantanu Naidu","t_jup":"2.692","condition_code":"0","sb_used":"SB441-N16","data_arc":"9404","cov_epoch":"2455743.5","not_valid_after":null,"model_pars":[{"desc":"non-gravitational radial acceleration parameter","name":"A1","units":"au/d^2","n":1,"kind":"EST","value":"1.044e-09","title":"non-grav. radial accel.","sigma":"1.648E-10"},{"sigma":"1.935E-11","title":"non-grav. transverse accel.","value":"2.972e-10","kind":"EST","n":2,"units":"au/d^2","name":"A2","desc":"non-gravitational transverse acceleration parameter"},{"desc":"non-gravitational perihelion-maximum offset","name":"DT","units":"d","n":3,"value":"-204","kind":"EST","title":"non-grav. perihelion offset","sigma":"48.17"}],"pe_used":"DE441","moid_jup":"0.605","n_obs_used":1874,"comment":null},"phys_par":[{"ref":"K244/33","sigma":"0.8","title":"comet total magnitude","notes":"2 parameter fit from 554 observations, autocmod 3.0f","value":"13.9","desc":"absolute magnitude of comet and coma (i.e. total)","name":"M1","units":null},{"sigma":null,"ref":"K244/33","title":"comet total magnitude slope","value":"9.","notes":"autocmod 3.0f","desc":"comet total magnitude slope parameter","units":null,"name":"K1"},{"ref":"Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H. (to be published)","sigma":null,"title":"diameter","notes":null,"value":"1.9","desc":"effective body diameter","name":"diameter","units":"km"}],"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"},"object":{"pha":false,"prefix":"P","kind":"cn","orbit_id":"K244/33","fullname":"50P/Arend","orbit_class":{"name":"Jupiter-family Comet","code":"JFc"},"neo":false,"des":"50P","spkid":"1000001"}}
