Dynamical maps in the osculating (a, e)-plane displaying the amplitude δe₁ of the eccentricity variation (top panel), the amplitude of the σ libration (middle panel), and the amplitude of the Δϖ libration (bottom panel) for a system of two equal-mass moons initially in a Trojan ACR configuration. Angles are in degrees. Trojan motion is unstable in the white regions in less than 5 × 10⁴ yr, and it is most stable in the blue regions. The stripes of less stable Trojan motion observed for a < 0.03 au correspond to the locations of the evection resonance and its higher harmonics.