This 14-frame animation shows the effect of Prometheus on Saturn’s F ring as it travels alongside, its gravity pulling the ring material into streamers that trail in its wake.
A clump of ring material leads in front of the moon on the opposite side of the ring. Honestly, I’m not sure what causes this feature. Maybe a Cassini team member would better answer that.
Photos were taken by the Cassini orbiter on March 29, 2009.
Raw image credit: NASA/JPL-Caltech. Assembled by J. Major.