Example of a simulation showing post-resonance eccentricity and inclination compatible with Iapetus’ actual orbit. Here, the resonance is crossed 90 millions years after the start of the simulation. As Iapetus evolves chaotically during the crossing, its eccentricity rises over 0.2, while the tilt also increases to over 10°. On such an orbit, Iapetus is expected to get ejected, but at the end, before getting out of the resonance, the eccentricity decreases to 0.05 while the tilt stays well over the value we observe today.