However the fine structure was observed by the Keck telescope using adaptive optics in 2002-2003.

Observed in back-scattered light the main ring appears to be razor thin, extending in the vertical direction no more than 30 km. In the side scatter geometry the ring thickness is 80-160 km, increasing somewhat in the direction of Jupiter. The ring appears to be much thicker in the forward-scattered light--about 300 km. One of the discoveries of the Galileo