PIA07623: Moons with Separate Paths

Moons with Separate Paths


Saturn's expansive rings separate the moon's Tethys (at the top) from Dione (at the bottom). Even in this distant view, it is easy to see that the moons' surfaces, and likely their evolutionary histories, are very different.

Both moons are on the far side of the rings in this scene, which shows their Saturn-facing hemispheres (terrain centered on 0 degrees longitude). The dark shadow across the rings is cast by Saturn's southern hemisphere.

The diameter of Tethys is 1,071 kilometers (665 miles) and the diameter of Dione is 1,126 kilometers (700 miles).

This image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 12, 2005, at a distance of approximately 2.4 million kilometers (1.5 million miles) from Saturn. The image scale is about 17 kilometers (11 miles) per pixel on the two moons.

Background Info:

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 .

Cataloging Keywords:

Name Value Additional Values
Target Tethys Dione, Saturn, Saturn Rings
System Saturn
Target Type Satellite Planet, Ring
Mission Cassini-Huygens
Instrument Host Cassini Orbiter
Host Type Orbiter
Instrument Imaging Science Subsystem (ISS)
Detector Narrow Angle Camera
Extra Keywords Grayscale, Shadow
Acquisition Date
Release Date 2005-11-03
Date in Caption
Image Credit NASA/JPL/Space Science Institute
Source photojournal.jpl.nasa.gov/catalog/PIA07623
Identifier PIA07623