PIA11525: Long Shadow of Tethys


Long Shadow of Tethys

Caption:

The shadow of the moon Tethys stretches across Saturn's A ring before fading into the B ring as the shadow extends towards the lower right of this image.

This view looks toward the unilluminated side of the rings from about 27 degrees above the ringplane. The shadow appears truncated by the dense B ring. Tethys (1062 kilometers, or 660 miles across) is not shown.

As Saturn approaches its August 2009 equinox, the planet's moons cast shadows onto the rings. To learn more about this special time and to see an earlier movie of a moon's shadow moving across the rings, see PIA11651 . To watch a movie of Tethys's shadow seen from a similar viewing geometry, see PIA11659 .

This image was taken in visible light with the Cassini spacecraft wide-angle camera on May 20, 2009. The view was acquired at a distance of approximately 1.4 million kilometers (870,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 128 degrees. Image scale is 82 kilometers (51 miles) per pixel.

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 A Ring, B Ring, Saturn, Saturn Rings, Sun
System Saturn
Target Type Satellite Planet, Ring, Sun
Mission Cassini-Huygens
Instrument Host Cassini Orbiter
Host Type Orbiter
Instrument Imaging Science Subsystem (ISS)
Detector Wide Angle Camera
Extra Keywords Grayscale, Shadow
Acquisition Date
Release Date 2009-06-30
Date in Caption 2009-05-20
Image Credit NASA/JPL/Space Science Institute
Source photojournal.jpl.nasa.gov/catalog/PIA11525
Identifier PIA11525