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Fig. 3

image

Phase curves for Ceres at different wavelengths (indicated in the plot): (a) absolute value; (b) after normalization; (c) and (d) same as (a) and (b) but with phase angle on logarithmic scale, respectively. In order to exploit the relative contribution in the back-scattering and forward-scattering lobes, the ideal phase angle with respect to which we normalize the phase curve would be α = 90°. Unfortunately, this phase angle is not covered in the investigated dataset. Similarly, the closest position for which observationsare provided, α = 91°, is affected bypoor statistics. Given this, the normalization in (b) and (d) was performed at α = 92°. Arrows in (c) and (d) represent the corresponding value for the 0° phase angle bin. Data are from Approach Phase, RC3, Transfer to Survey, Survey, and OE observations.

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