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Undulations mark both sides of the path of Saturn's moon Daphnis through the A ring.
Daphnis may be small at only 8 kilometers (5 miles) across, but the moon's gravity is great enough, and the Keeler gap in which it resides is narrow enough, to perturb the particles in the ring and create the wavelike patterns seen here.
This view looks toward the unilluminated side of the rings from about 47 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 21, 2009. The view was acquired at a distance of approximately 1.1 million kilometers (684,000 miles) from Daphnis and at a Sun-Daphnis-spacecraft, or phase, angle of 50 degrees. Image scale is 7 kilometers (4 miles) per pixel.
The Cassini Equinox Mission is a joint United States and European endeavor. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter was designed, developed and assembled at JPL. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.