Dynamical maps of the δψ indicator in the (a, ψ)-plane for the outer evection, with initial e = 0.4. The leftpanel corresponds to a grid of osculating elements, while the right panel is the same grid in terms of mean elements. Blue regions represent the conditions for which δ ψ ≲ 30°. Gray regionscorrespond to larger libration amplitudes or circulation of ψ. White regions are unstable orbits. The resonance occurs at a mean semi-major axis ā = 0.205 au. The upper horizontal axis is the distance in terms of R_Hill.