{"object":{"spkid":"1000022","neo":true,"des":"79P","prefix":"P","pha":false,"kind":"cn","orbit_id":"17","fullname":"79P/du Toit-Hartley","orbit_class":{"name":"Jupiter-family Comet","code":"JFc"}},"phys_par":[{"ref":"17","value":"17.4","name":"M1","desc":"absolute magnitude of comet and coma (i.e. total)","notes":"2 parameter fit from 124 observations, autocmod 2.9c","title":"comet total magnitude","sigma":"0.9","units":null},{"title":"comet total magnitude slope","sigma":null,"units":null,"value":"4.5","ref":"17","name":"K1","desc":"comet total magnitude slope parameter","notes":"autocmod 2.9c"},{"units":"km","sigma":null,"title":"diameter","notes":null,"desc":"effective body diameter","name":"diameter","value":"2.8","ref":"Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264"}],"orbit":{"not_valid_after":null,"rms":"0.89","first_obs":"1986-12-27","pe_used":"DE441","epoch":"2454391.5","sb_used":"SB441-N16","two_body":null,"source":"JPL","equinox":"J2000","moid":"0.234","n_obs_used":215,"last_obs":"2013-04-04","t_jup":"2.943","data_arc":"9595","model_pars":[{"title":"non-grav. radial accel.","kind":"EST","units":"au/d^2","sigma":"1.985E-10","name":"A1","value":"-3.974e-10","desc":"non-gravitational radial acceleration parameter","n":1},{"kind":"EST","title":"non-grav. transverse accel.","sigma":"1.142E-12","units":"au/d^2","desc":"non-gravitational transverse acceleration parameter","value":"-6.695e-13","name":"A2","n":2}],"cov_epoch":"2454391.5","n_dop_obs_used":null,"not_valid_before":null,"soln_date":"2021-05-04 14:20:50","producer":"Javier Roa","orbit_id":"17","comment":null,"moid_jup":"0.366","n_del_obs_used":null,"condition_code":"1","elements":[{"label":"e","units":null,"sigma":"4.5e-07","title":"eccentricity","name":"e","value":"0.594"},{"units":"au","sigma":"3.6e-07","label":"a","name":"a","title":"semi-major axis","value":"3.03"},{"units":"au","sigma":"1.5e-06","label":"q","title":"perihelion distance","name":"q","value":"1.23"},{"name":"i","title":"inclination; angle with respect to x-y ecliptic plane","value":"2.89","label":"i","units":"deg","sigma":"2.3e-05"},{"name":"om","title":"longitude of the ascending node","value":"308","units":"deg","sigma":"0.00021","label":"node"},{"sigma":"0.00023","units":"deg","label":"peri","value":"253","title":"argument of perihelion","name":"w"},{"label":"M","units":"deg","sigma":"2e-05","title":"mean anomaly","name":"ma","value":"318"},{"label":"tp","sigma":"0.00011","units":"TDB","value":"2454614.911","name":"tp","title":"time of perihelion passage"},{"label":"period","sigma":"0.00034","units":"d","value":"1930","name":"per","title":"sidereal orbital period"},{"value":"0.187","name":"n","title":"mean motion","sigma":"3.3e-08","units":"deg/d","label":"n"},{"title":"aphelion distance","name":"ad","value":"4.83","units":"au","sigma":"5.7e-07","label":"Q"}]},"signature":{"source":"NASA/JPL Small-Body Database (SBDB) API","version":"1.3"}}