This video shows the stochastic orbital migration of a small moonlet. The moonlet creates a long wavelength response in the rings which is only partially shown in this video. Due to stochastic forces from clumps and collisions, the moonlet undergoes a random walk.
This video corresponds to simulation EQ40050DT in a recent publication by Rein and Papaloizou (online preprint: http://arxiv.org/abs/1006.1643 ).
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