Phase curves of the planet, the moon, and the planet and moon together but without the influence of mutual events. Top: Flux F/F₀ as a function of the phase angle α. For the planet and for planet and moon combined, F₀ = F_0p. In contrast, for the moon, F₀ = F_0m. In addition, we use the analytic result from Russell (1916) for a Lambertian sphere for the phase curve of the moon. Middle: Phase curves for the linear polarization P(α) for the planet and planet and moon combined, assuming P_m = 0 (i.e., of the diffuse reflecting moon surface). The stellar flux is not included in the calculation of P. Bottom: Difference P − P_p between the polarization phase curve of the unresolved system consisting of planet and moon and the planetary polarization phase curve.