The Cassini spacecraft acquired this view of Rhea's leading hemisphere
near "opposition," or with the Sun almost directly behind the camera.
Under this geometry, topography appears less rugged because crater rims
and hills hide their own shadows. Consequently, in this view, the contrast
between ejecta from Rhea's bright ray crater and the surrounding terrain
is subdued, making the rays barely discernible. (Look towards the upper
left hand side to see the rays.)
In this image, the brightest features are sunward-facing crater walls.
The image was taken in visible light with the Cassini spacecraft
narrow-angle camera on Aug. 29, 2008 at a distance of approximately 1.346
million kilometers (836,000 miles) from Rhea and at a Sun-Rhea-spacecraft,
or phase, angle of about 1 degree. Image scale is 8 kilometers (5 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 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/. The Cassini imaging team
homepage is at http://ciclops.org.