CICLOPS: Cassini Imaging Central Laboratory for OPerationS
The Perturber

The Perturber
PIA 08914

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  The oblong form of Prometheus glides by, trailing behind it wiggles in Saturn's ribbon-like F ring.

Prometheus (86 kilometers, 53 miles across) causes a great deal of perturbation to the F ring, including kinks, knots and gores in the shape of the ring structure. Studying the moon and its interactions with the F ring is teaching scientists a great deal about how ring structures form and evolve.

This view looks toward the unlit side of the rings from about 27 degrees above the ringplane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 24, 2007 at a distance of approximately 1.5 million kilometers (900,000 miles) from Prometheus. Image scale is 9 kilometers (6 miles) per pixel.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. 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.

For more information about the Cassini-Huygens mission, visit and the Cassini imaging team home page,

Credit: NASA/JPL/Space Science Institute
Released: April 10, 2007 (PIA 08914)
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