Dynamics of trans-Neptunian objects near the 3/1 mean-motion resonance with Neptune

Open Access

Fig. 6

Level curves of the averaged Hamiltonian Eq. (14) in the plane (e cos σ₀, e sin σ₀) for N = 15.43 au²/yr (corresponding to e ≈ 0.3 and a/a′ = 3^2/3). The contours of the narrow libration area (separatrix) corresponding to the 3/1 MMR is given in red.

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