{"object":{"kind":"cu","fullname":"C/2025 N1 (ATLAS)","orbit_class":{"code":"HYP","name":"Hyperbolic Comet"},"pha":false,"des":"2025 N1","neo":false,"orbit_id":"55","prefix":"C","spkid":"1004083"},"orbit":{"orbit_id":"55","n_obs_used":117,"last_obs":"2026-10-16","cov_epoch":"2461340.5","not_valid_before":null,"soln_date":"2026-10-21 09:51:09","n_del_obs_used":null,"moid":"0.362","model_pars":[{"n":1,"sigma":"4.838E-9","title":"non-grav. radial accel.","desc":"non-gravitational radial acceleration parameter","units":"au/d^2","kind":"EST","name":"A1","value":"4.618e-08"},{"name":"A2","value":"-9.559e-09","n":2,"sigma":"2.012E-9","title":"non-grav. transverse accel.","units":"au/d^2","desc":"non-gravitational transverse acceleration parameter","kind":"EST"},{"kind":"EST","desc":"non-gravitational normal acceleration parameter","units":"au/d^2","title":"non-grav. normal accel.","sigma":"1.651E-9","n":3,"value":"-8.295e-09","name":"A3"},{"value":"1.","name":"ALN","desc":"normalizing factor [default 0.1112620426]","units":null,"kind":"SET","n":0,"sigma":null,"title":"normalizing factor"},{"desc":"non-gravitational perihelion-maximum offset","units":"d","kind":"EST","n":4,"title":"non-grav. perihelion offset","sigma":"9.195","value":"28.5","name":"DT"},{"name":"NK","value":"0.","n":0,"sigma":null,"title":"non-grav. model exp. k","units":null,"desc":"non-grav. model constant, exponent k [default 4.6142]","kind":"SET"},{"units":null,"desc":"non-grav. model constant, exponent m [default 2.15]","kind":"SET","n":0,"sigma":null,"title":"non-grav. model exp. m","value":"2.","name":"NM"},{"value":"0.","name":"NN","desc":"non-grav. model constant, exponent n [default 5.093]","units":null,"kind":"SET","n":0,"title":"non-grav. model exp. n","sigma":null},{"n":0,"sigma":null,"title":"normalizing distance","desc":"normalizing distance, au [default 2.808 au]","units":"au","kind":"SET","name":"R0","value":"1."}],"rms":"0.42","elements":[{"units":null,"label":"e","sigma":"4.4e-05","title":"eccentricity","value":"6.12","name":"e"},{"value":"-0.264","name":"a","units":"au","label":"a","sigma":"1.8e-06","title":"semi-major axis"},{"sigma":"4.1e-06","title":"perihelion distance","units":"au","label":"q","name":"q","value":"1.35"},{"value":"175","name":"i","label":"i","units":"deg","sigma":"7.7e-05","title":"inclination; angle with respect to x-y ecliptic plane"},{"name":"om","value":"323","sigma":"0.00052","title":"longitude of the ascending node","units":"deg","label":"node"},{"name":"w","value":"129","sigma":"0.00053","title":"argument of perihelion","label":"peri","units":"deg"},{"name":"ma","value":"2640","title":"mean anomaly","sigma":"0.025","units":"deg","label":"M"},{"value":"2460977.942","name":"tp","label":"tp","units":"TDB","title":"time of perihelion passage","sigma":"0.00018"},{"title":"sidereal orbital period","sigma":null,"units":"d","label":"period","name":"per","value":null},{"sigma":"7.4e-05","title":"mean motion","units":"deg/d","label":"n","name":"n","value":"7.27"},{"units":"au","label":"Q","sigma":null,"title":"aphelion distance","value":null,"name":"ad"}],"moid_jup":"0.247","producer":"Davide Farnocchia","sb_used":"SB441-N16","epoch":"2461340.5","n_dop_obs_used":null,"t_jup":null,"pe_used":"DE441","comment":"Temporary solution to support JWST Program 13145","equinox":"J2000","source":"JPL","data_arc":"378","first_obs":"2025-10-03","not_valid_after":null,"condition_code":null,"two_body":null},"phys_par":[{"notes":"2 parameter fit from 106 observations, autocmod 3.0g","units":null,"desc":"absolute magnitude of comet and coma (i.e. total)","sigma":"01.","title":"comet total magnitude","value":"11.8","name":"M1","ref":"55"},{"sigma":null,"title":"comet total magnitude slope","notes":"autocmod 3.0g","desc":"comet total magnitude slope parameter","units":null,"name":"K1","ref":"55","value":"7.5"}],"signature":{"version":"1.3","source":"NASA/JPL Small-Body Database (SBDB) API"}}
