{"object":{"des":"99P","neo":false,"spkid":"1000055","pha":false,"prefix":"P","orbit_id":"75","orbit_class":{"code":"JFc","name":"Jupiter-family Comet"},"fullname":"99P/Kowal 1","kind":"cn"},"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"},"phys_par":[{"notes":"from 1403 observations, assumed slope, autocmod 3.0g","sigma":"0.7","name":"M1","desc":"absolute magnitude of comet and coma (i.e. total)","ref":"75","title":"comet total magnitude","value":"6.8","units":null},{"name":"K1","sigma":null,"notes":"autocmod 3.0g","desc":"comet total magnitude slope parameter","value":"12.","title":"comet total magnitude slope","ref":"75","units":null},{"ref":"75","title":"comet nuclear magnitude","value":"11.5","units":null,"notes":"from 147 observations, autocmod 3.0g","sigma":"0.8","name":"M2","desc":"absolute magnitude of comet nucleus"},{"value":"5.","title":"comet nuclear magnitude slope","ref":"75","units":null,"name":"K2","notes":"autocmod 3.0g","sigma":null,"desc":"comet nuclear magnitude slope parameter"},{"units":null,"ref":"75","title":"comet nuclear phase coefficient","value":"0.03","desc":"comet nuclear magnitude law phase coefficient","notes":"autocmod 3.0g","sigma":null,"name":"PC"},{"units":"km","value":"10.2","title":"diameter","ref":"Scotti,J (1994) BAAS 26:1375","desc":"effective body diameter","sigma":null,"notes":null,"name":"diameter"}],"orbit":{"cov_epoch":"2457072.5","model_pars":[],"rms":"0.61","sb_used":"SB441-N16","not_valid_after":null,"last_obs":"2025-09-22","n_obs_used":1734,"first_obs":"1977-04-24","two_body":null,"source":"JPL","producer":"Shantanu Naidu","moid":"3.72","pe_used":"DE441","orbit_id":"75","equinox":"J2000","epoch":"2457072.5","data_arc":"17683","n_dop_obs_used":null,"soln_date":"2026-09-08 08:46:31","n_del_obs_used":null,"elements":[{"sigma":"8.1e-08","value":"0.23","name":"e","title":"eccentricity","label":"e","units":null},{"sigma":"8.2e-08","name":"a","value":"6.13","title":"semi-major axis","label":"a","units":"au"},{"label":"q","units":"au","sigma":"4.9e-07","title":"perihelion distance","value":"4.72","name":"q"},{"title":"inclination; angle with respect to x-y ecliptic plane","value":"4.34","name":"i","sigma":"9.5e-06","units":"deg","label":"i"},{"sigma":"8.6e-05","title":"longitude of the ascending node","name":"om","value":"28.2","label":"node","units":"deg"},{"label":"peri","units":"deg","sigma":"0.0001","title":"argument of perihelion","name":"w","value":"174"},{"title":"mean anomaly","value":"191","name":"ma","sigma":"3.8e-05","units":"deg","label":"M"},{"sigma":"0.0006","title":"time of perihelion passage","value":"2459677.566","name":"tp","label":"tp","units":"TDB"},{"label":"period","units":"d","sigma":"0.00011","value":"5550","name":"per","title":"sidereal orbital period"},{"sigma":"1.3e-09","value":"0.0649","name":"n","title":"mean motion","label":"n","units":"deg/d"},{"label":"Q","units":"au","sigma":"1e-07","name":"ad","value":"7.54","title":"aphelion distance"}],"condition_code":"0","t_jup":"2.956","not_valid_before":null,"moid_jup":"0.308","comment":null}}
