CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Streaming Away
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Streaming Away
PIA 10415

Avg Rating: 9.21/10

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  Saturn's moon Prometheus pulls away from an encounter with the narrow F ring, trailing a streamer of fine, icy particles behind it.

See PIA08397 for a movie of Prometheus creating a streamer in the F ring.

Prometheus (86 kilometers, 53 miles across) is lit by the Sun from lower right. Dim, reflected light from Saturn illuminates the moon from the top. Some hints of topography can be seen on the Saturn-lit side. The F-ring streamer is seen at left.

This view looks toward the unilluminated side of the rings from about 67 degrees above the ringplane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 25, 2008. The view was obtained at a distance of approximately 534,000 kilometers (332,000 miles) from Prometheus and at a Sun-Prometheus-spacecraft, or phase, angle of 92 degrees. Image scale is 3 kilometers (2 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.

For more information about the Cassini Equinox Mission visit, and

Credit: NASA/JPL/Space Science Institute
Released: July 1, 2008 (PIA 10415)
Image/Caption Information

Alliance Member Comments
Red_dragon (Jul 1, 2008 at 9:37 AM):
Superb and somewhat irreal due to NAC effects; the streamer rather than that looks as the ring's edge.