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Prometheus is caught in the act of creating gores and streamers in the F
ring. Scientists believe that Prometheus and its partner-moon Pandora are
responsible for much of the structure in the F ring.
The orbit of Prometheus (53 miles, or 86 kilometers across) regularly brings
it into the F ring. When this happens, it creates gores, or channels, in the
ring where it entered. Prometheus then draws ring material with it as it exits
the ring, leaving streamers in its wake. This process creates the pattern of
structures seen in this image. This process is described in detail, along with a
movie of Prometheus creating one of the streamer/channel features, in PIA08397.
This view looks toward the sunlit side of the rings from about 8.6 degrees
above the ringplane. The image was taken in visible light with the Cassini
spacecraft narrow-angle camera on Feb. 11, 2014.
The view was acquired at a distance of approximately 1.3 million miles (2.1
million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle
of 147 degrees. Image scale is 8 miles (13 kilometers) 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
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 operations center is based at the Space Science Institute in
For more information about the Cassini-Huygens mission visit