Diameters of the 28 largest moons (blue), two smallest planets (pink), and two largest asteroids (aqua).  Diameter of Titan measured at its cloudtops is in orange.  Titan's atmosphere is very deep.

You can see that the moons cluster into five size ranges.  For convenient reference, I've lumped the first two ranges together and arbitrarily labeled them "large", the next two ranges "medium", and all the rest as "small".  Bodies the size of Hyperion and smaller can be quite irregular in shape.

To my Space and Science home page  for more about the Solar System

Jeff Root
July 12, 2005