Equilibrium spin frequency f_eq = Ω_s/n as a function of eccentricity for fixed values of the local Maxwell parameter nτ_M. The black curve shows the Hut pseudo-synchronous value. Horizontal guide lines mark the approximate spin–orbit resonances Ω_s/n = N/2 associated with the dominant m = 2 harmonics. In the solid-like regime, the equilibrium spin can lock near these resonances. At lower eccentricity, the resonant structure is visibly discrete, whereas at high eccentricity the relevant N values are large and densely spaced, producing a smoother envelope.