Phase portraits for ψ_⋆0 = 70° presented in the (ψ_1⋆ cos Δh, ψ_1⋆ sin Δh) plane, where Δh represents the difference in the longitudes of the ascending node between the inner and outer orbits. These portraits were generated by plotting level curves of the perturbing Hamiltonian (Eq. (33)). In the upper panels, ϵ_⋆p = 10.0 and ϵ_⋆d = 0.1, 1.5, and 5.0, respectively. In the lower panels, ϵ_⋆p = 1.0 with the same variations in ϵ_⋆d. Equilibrium points are indicated with colored markers. The projections of ${\hat{\mathit{s}}}_{\star }$ and ${\hat{\mathit{l}}}_{\mathrm{d}}$ on this plane are denoted by filled triangles.