Fig. 3

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Evolution of objects close to the 1:2 resonance demonstrating the sizes of the resonance islands. The abscissa and ordinate represent the resonance angle ϕ and the semimajor axis (in Neptune’s semimajor axis aN), respectively. The planetesimal’s eccentricity and Neptune’s migration rate are indicated in each panel. For each particle, the time interval between two adjacent points is 1000 yr.
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