Are irregular satellites defined as those with asymmetric albedo patterns?

[vertigonight]

help again.

[Ophiolite]

This is a guess:

Irregular satellites will be defined by their significant deviation from a spherical or oblate spheroidal shape. In practically all circumstances an irregular satellite will have an asymmetric albedo. However, near spherical (i.e. regular) satellites may also have asymmetric albedos if their surfaces are distinctly different on a large scale. Dione would be the classic example of this with strong albedo contrasts between its two hemispheres.