Fig. 6

Semi-major axis evolution of a fragment that underwent a very close encounter (minimum distance of 3.4 × 10-5 AU) with Vesta (at t ≈ 8.39 Myr). We plot the maximum, minimum, and instantaneous values of the semi-major axis of the fragment. All times of encounters closer than 10-3 AU are highlighted with dotted vertical lines.
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