Wavy Shadows (ctx frame)

Caption NASA:"This image of shadows on the Rings and others like it (see also PIA11653 and PIA11655) are only possible around the time of Saturn's equinox which occurs every half-Saturn-year, equivalent to about 15 Earth years. The illumination geometry that accompanies equinox lowers the Sun's angle to the Ring-Plane and causes out-of-plane structures to cast long shadows across the Rings.

This view looks toward the unilluminated side of the Rings from about 49° above the Ring-Plane. The image was taken in visible light with the Cassini Spacecraft narrow-angle camera on April 13, 2009.
The view was obtained at a distance of approx. 1,2 MKM (about 746.000 miles) from Daphnis and at a Sun-Daphnis-Spacecraft, or phase, angle of 56°.
Image scale is roughly 7 Km (about 5 miles) per pixel".