CICLOPS: Cassini Imaging Central Laboratory for OPerationS
Darkened Moons, Searing F Ring

Darkened Moons, Searing F Ring
PIA 08225

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  Two ring moons chase each other as their larger sibling looks on.

This view shows Tethys (1,062 kilometers, 660 miles across at lower left), along with perpetually mingling Epimetheus (113 kilometers, 70 miles across at left of center) and Janus (179 kilometers, 111 miles across at center).

In the background, the faint G ring and brilliant F ring bound the location where Cassini entered Saturn orbit. The spacecraft passed between these two rings upon arrival in mid-2004.

Near the right side of the image, a couple of ringlets within the Encke gap glow faintly.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 15, 2006 at a distance of approximately 3.9 million kilometers (2.4 million miles) from Janus, 4 million kilometers (2.5 million miles) from Epimetheus and 3.7 million kilometers (2.3 million miles) from Tethys. Image scale is 24 kilometers (15 miles) per pixel on Janus and Epimetheus and 22 kilometers (14 miles) per pixel on Tethys.

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 Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo.

For more information about the Cassini-Huygens mission, visit and the Cassini imaging team home page,

Credit: NASA/JPL/Space Science Institute
Released: July 20, 2006 (PIA 08225)
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