Dione shows Cassini some of the bright wispy streaks that cover much of
the moon's trailing hemisphere. The streaks are thought to be deposits of
icy material that has been extruded onto the moon's surface from the
interior. Dione's diameter is 1,118 kilometers (695 miles) across.
The image was taken in visible light with the Cassini spacecraft narrow
angle camera on Sept. 28, 2004, at a distance of 7.3 million kilometers
(4.5 million miles) from Dione and at a Sun-Dione-spacecraft, or phase,
angle of 79 degrees. The image scale is 44 kilometers (27 miles) per
pixel. The image has been magnified by a factor of four 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.
