Fig. 1

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Distribution of Hilda asteroids (depicted in red) and quasi-Hilda objects (depicted in blue) presented in the (a, e) plane (left) and (a, Φ) plane. The black ellipse in the left panel indicates the limits between the Hilda and quasi-Hildas regions, whereas the black curve in the right panel indicates the separatrix of the 3:2 MMR.
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