Ceres’ magnitude phase curve V(1,1,α) as derived from VIR disk-resolved observations (diamonds). Error bars are derived from the standard deviation of the spectrally integrated I/F in each phase angle bin. Red curves are derived by fitting the dataset with the H-G formalism (solid line) and linear model (dashed line) for α ≤ 30°. Blue curves are obtained by fitting the whole phase angle interval.