Prometheus has just passed -- and gravitationally disturbed -- some of
the fine particulate material in the F ring, creating the sheared gap
visible in the inner strands of the ring. Prometheus is 102 kilometers
(63 miles) across.
This view looks down from about 10 degrees above the ringplane.
Prometheus and the rings are sunlit from below. At the lower right lies
the outermost part of the A ring, which grows suddenly brighter outside
of the 42-kilometer-wide (26-mile) Keeler Gap.
The image was taken in visible green light with the Cassini spacecraft
narrow-angle camera on Aug. 2, 2005, at a distance of approximately
632,000 kilometers (392,000 miles) from Prometheus and at a
Sun-Prometheus-spacecraft, or phase, angle of 122 degrees. Image scale is
4 kilometers (2 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 mission for NASA's Science Mission Directorate, Washington, D.C. The
Cassini orbiter was designed, developed and assembled at JPL.
For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov.
For additional images visit the Cassini imaging team homepage http://ciclops.org.