Daphnis and Keeler (context image)

Caption NASA originale:"Daphnis, the tiny moon that inhabits the Keeler Gap in the outer edge of Saturn's A-Ring, is captured here in remarkable detail with its entourage of waves.
The edge waves are especially bright in places where Ring material piles up, a characteristic that has been seen in computer simulations of the interactions between gap-embedded moons and the surrounding ring particles.

The 7 Km-wide (about 4,3 mile) moon appears to have an unusual shape in this image. It is not simply a bright dot, but instead exhibits a dimmer component immediately to its left. Though it is far from certain, this component may be Ring material caught in the act of accreting onto Daphnis, a process currently being studied by imaging scientists.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 9, 2006, at a distance of approx. 422.000 Km (such as about 262.000 miles) from Saturn. Image scale is roughly 2 Km (a little more than 1 mile) per pixel".