Rhea sports an immense impact scar on its leading hemisphere, like several
other major Saturnian moons. The impact basin, seen above center on the
day-night dividing line, or terminator, is named Tirawa, and is about 360
kilometers (220 miles) across.
North on Rhea (1,528 kilometers, or 949 miles across) is up.
The image was taken in visible light with the Cassini spacecraft
narrow-angle camera on June 1, 2007. The view was acquired at a distance
of approximately 1.6 million kilometers (1 million miles) from Rhea and at
a Sun-Rhea-spacecraft, or phase, angle of 55 degrees. Image scale is 10
kilometers (6 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/home/index.cfm. The Cassini imaging team
homepage is at http://ciclops.org.