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The thin sliver of Saturns moon Prometheus lurks near ghostly structures in Saturns narrow F ring in this view from NASAs Cassini spacecraft. Many of the narrow rings faint and wispy features result from its gravitational interactions with Prometheus (86 kilometers, or 53 miles across).

Most of the small moons surface is in darkness due to the viewing geometry here. Cassini was positioned behind Saturn and Prometheus with respect to the sun, looking toward the moons dark side and just a bit of the moons sunlit northern hemisphere.

Also visible here is a distinct difference in brightness between the outermost section of Saturns A ring (left of center) and rest of the ring, interior to the Keeler Gap (lower left).

This view looks toward the sunlit side of the rings from about 13 degrees above the ring plane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 13, 2017.

The view was acquired at a distance of approximately 680,000 miles (1.1 million kilometers) from Saturn. Image scale is 4 miles (6 kilometers) per pixel.