Residence region for seven long-lived NEO-Centaurs (T_res > 1 Myr) (top) and sixty-nine short-lived NEO-Centaurs (T_res < 1 Myr) (bottom). The colored lines delineate the pericenter crossings of the giant planets’ orbits: Jupiter, Saturn, Uranus, and Neptune. The color code on the right indicates the mean percentage of time spent as a Centaur relative to the total lifetime of each subgroup in the (a × e) grid with ∆_a = 2 au and ∆_e = 0.1.