Polarization maps for different phase angles at a wavelength of 400 nm. The polarized flux F_pP_p is encoded as a color map. The resolution is 60 × 60 px, the planet has a diameter of 50 px. Polarization directions are shown as white lines. The larger orange circle marks the planet’s circumference. The orange dashed lines between the poles of the planet mark the terminator. The day side of the planet is to the right of it. The horizontal orange lines mark the path of the moon during a central transit (lower pair of lines), or a noncentral transit (upper pair of lines). For two positions on the edge of the planet, the circumference of the moon is shown as an orange circle.