This map of the surface of Saturn's moon Enceladus, generated from images
taken by NASA's Cassini and Voyager spacecraft, illustrates the imaging
coverage planned for Cassini's very close flyby of the geologically active
moon on March 12, 2008.
This flyby will be Cassini's closest approach to Enceladus so far, the
fourth and final Enceladus flyby of the four-year prime mission, and the
first of four close brushes with this moon that have been proposed for
2008. At closest approach, the spacecraft will be only about 50 kilometers
(30 miles) above the surface of Enceladus, and will pass the moon at a
speed of about 14 kilometers (9 miles) per second. Enceladus is 505
kilometers (314 miles) across.
During this flyby, as well as the flyby on Oct. 9, 2008, Cassini's in-situ
instruments will make the most of the remarkably close encounters. The
imaging cameras and the other optical remote sensing instruments will get
a better look at the moon during the flybys that have been proposed for
Aug. 11 and Oct. 31. Radar will acquire albedo measurements during the
March and Oct. encounters.
Colored lines on the map enclose regions that will be covered at different
imaging scales as Cassini encounters Enceladus. The highest-resolution
images, about 200 meters (660 feet) per pixel, will be obtained over the
cratered terrains of the northern hemisphere, prior to closest approach.
Cassini will also acquire images soon after closest approach. However, the
moon will be in eclipse during this time—sitting within Saturn's
shadow—and surface features will likely not be visible. Additional
images at resolutions above 700 meters per pixel (2,300 feet) will be
acquired following the eclipse period.
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.