The "true shape" of Phoebe

Caption NASA originale:"This colorful graphic illustrates that despite Phoebe's bumpy, irregular topography, the moon has a fairly round shape. A digitally rendered shape model of Phoebe was constructed using Cassini imaging data obtained before and after the spacecraft's close flyby of the Saturnian moon on June 11, 2004.
The average diameter of Phoebe is about 214 Km. The four views of the model are each separated by a 90° rotation; the upper left is centered at 0° West longitude. The others show regions of the moon centered at 90, 180 and 270° West longitude, as labeled. The coloring of the models corresponds to the height of Phoebe's surface, relative to the lowest point - a range of about 16 Km - going from blue (low) to red (high). Interestingly, much of this range in height occurs in 1 large crater, visible in the 180° West view".