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Saturn's F Rings In Line.


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Saturn's tiny Moon Prometheus.
Saturn's tiny Moon Prometheus.

This is an image of Saturn's tiny Moon Prometheus, which shepherds the inner edge of Saturn's F ring. The irregular Moon is only 102 km (63 miles) across but its gravity defines the edge of the ring, essentially keeping it in line. The image was taken by NASA's Cassini spacecraft on August 5, when it was 8.2 million km (5.1 million miles) from the planet.

Saturn's Moon Prometheus is seen shepherding the inner edge of Saturn's F ring. Prometheus is 102 kilometers (63 miles) across and was captured in a close-up view by the Cassini spacecraft near the time of orbital insertion at Saturn PIA06098. A number of clumps are visible here along the arcing F ring.

The image was taken with the Cassini spacecraft narrow angle camera on Aug. 5, 2004, at 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. Contrast was slightly 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 Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.

For more information about the Cassini-Huygens mission, visit http://saturn.jpl.nasa.gov and the Cassini imaging team home page, http://ciclops.org.




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