  The dynamics of the outer regular satellites of Saturn are driven primarily
by the outward migration of Titan, but several independent constraints on
Titan's migration are difficult to reconcile with the current resonant orbit of
the small satellite Hyperion. We argue that Hyperion's rapid irregular tumbling
greatly increases tidal dissipation with a steep dependence on orbital
eccentricity. Resonant excitation from a migrating Titan is then balanced by
damping in a feedback mechanism that maintains Hyperion's eccentricity without
fine-tuning. The inferred tidal parameters of Hyperion are most consistent with
rapid Titan migration enabled by a resonance lock with an internal mode of
Saturn, but a scenario with only equilibrium dissipation in Saturn is also
possible.
