Modeling the narrow-band reflectances, calculated as the average of a box of 3 × 3 pixels centered on the location of the red star in Fig. 4A, with ι, ϵ < 50°. The best-fit model parameters are listed in Table 3. Panel A: Akimov phase function (Eq. (5)). Panel B: exponential phase function (Eq. (5) with m = 0), fitted to α < 1.5°. The model curves account for the finite size of the Sun, with the vertical dotted line indicating the angular radius of the Sun at Ceres.