PIA08229: Enceladus Approaches
 Target Name:  Rhea
 Is a satellite of:  Saturn
 Mission:  Cassini-Huygens
 Spacecraft:  Cassini Orbiter
 Instrument:  ISS - Narrow Angle
 Product Size:  518 x 420 pixels (w x h)
 Produced By:  Cassini Imaging Team
 Primary Data Set:  Cassini
 Full-Res TIFF:  PIA08229.tif (218 kB)
 Full-Res JPEG:  PIA08229.jpg (4.357 kB)

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Original Caption Released with Image:

Rhea and Enceladus shared the sky just before the smaller moon passed behind its larger, cratered sibling.

This image is part of a "mutual event" series in which one moon passes close to or in front of another. These sequences help scientists refine the orbits of Saturn's moons.

Cratered Rhea is 1,528 kilometers (949 miles) across and presumed to be geologically dead. While much smaller, Enceladus (505 kilometers, or 314 miles across) is geologically active today.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on July 4, 2006 at a distance of approximately 1.4 million kilometers (800,000 miles) from Rhea and 1.9 million kilometers (1.2 million miles) from Enceladus. The view was obtained at a Sun-moon-spacecraft, or phase, angle of about 142 degrees relative to both moons. Image scale is 8 kilometers (5 miles) per pixel on Rhea and 11 kilometers (7 miles) on Enceladus.

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.

Image Credit:
NASA/JPL/Space Science Institute

Image Addition Date: