CICLOPS: Cassini Imaging Central Laboratory for OPerationS
Herding the Rings

Herding the Rings
PIA 06481

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  Prometheus is seen shepherding the inner edge of Saturn's F ring. Prometheus is 86 kilometers (53 miles) across and was captured in a close-up view by Cassini near the time of orbital insertion at Saturn (see PIA06098). A number of clumps are visible here along the arcing F ring.

The image was taken with the narrow angle camera on August 5, 2004, from a distance of 8.2 million kilometers (5.1 million miles) from Saturn through a filter sensitive to visible green light. The image scale is 49 kilometers (33 miles) per pixel. The image has been slightly contrast-enhanced to aid visibility.

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: September 21, 2004 (PIA 06481)
Image/Caption Information