Limb shape from 1997 and 2001 is plotted here. The equator corresponds to position angle 0. Data have been averaged into 10° wide bins, and the best‐fit ﹩l=2﹩ (oblateness) and ﹩l=4﹩ (hexadecapole) Legendre polynomial have been plotted. The shape distortion after correcting for bright contamination is nearly a pure oblateness term in 2001, while 1997 has a significant hexadecapolar shape contribution.