This view, like PIA08303, shows Prometheus with a streamer it has created
in the inner edge of the F ring. Prometheus comes close to the inner edge
of the ring once per orbit, perturbing the ring particles there. In 2009,
the moon's orbit is expected to carry it repeatedly into the F ring core,
an event that ring scientists are eagerly awaiting.
Prometheus is 102 kilometers (63 miles) across. This view looks toward the
unlit side of the rings from about 40 degrees above the ringplane.
The image was taken in visible light with the Cassini spacecraft
narrow-angle camera on Oct. 16, 2006 at a distance of approximately 1.8
million kilometers (1.1 million miles) from Prometheus and at a
Sun-Prometheus-spacecraft, or phase, angle of 150 degrees. Scale in the
original image was 11 kilometers (7 miles) per pixel. The image has been
magnified by a factor of two.
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 Boulder, Colo.
For more information about the Cassini-Huygens mission visit
http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team
homepage is at http://ciclops.org.