Signs of Daphnis...

Caption NASA:"Edge waves in the Keeler Gap betray the presence of the embedded moon Daphnis.
Though the Cassini spacecraft cannot see Daphnis (only 7 - or approx. 4,3 miles - across) in this image (because the spacecraft is looking at its Dark Side), the tiny moon is undoubtedly located right of center, where the inner edge waves cease and the outer waves begin. The little moon was discovered in Cassini images that revealed its signature waves in the Keeler Gap (42 Km, or about 26 miles wide).

At left lies the brilliant F-Ring with its flanking strands. The bright F-Ring core is about 50 Km (approx. 30 miles) wide.
This view looks toward the unlit side of the Rings from about 32° above the Ring-Plane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 29, 2006 at a distance of approx. 1,7 MKM (such as a little more than 1 MMs) from Saturn and at a phase angle of 157°.
Image scale is about 10 Km (approx. 6 miles per pixel)".