Time evolution of various parameters. The distance of 83982 Crantor (2002 GO₉) from Uranus (panel A)); the value of the Hill sphere radius of Uranus, 0.447 AU, is displayed. The resonant angle, λ_r (panel B)) for the nominal orbit in Table 1 (thick line) and one of the control orbits (thin line). This particular control orbit was chosen close to the 3-σ limit so its orbital elements are most different from the nominal ones. The orbital elements a (panel C)) with the current value of Uranus’ semi-major axis, e (panel D)), i (panel E)), and ω (panel F)).