CICLOPS: Cassini Imaging Central Laboratory for OPerationS
Crater Comparison

This view of Saturn's moon Rhea includes two large and ancient impact basins and a more recent, bright ray crater.

The large basin above center is named Tirawa. This feature (and the similar-sized crater to its left) is overprinted by many other craters, meaning it is an extremely old feature that has collected other impacts over the eons.

For a high-resolution view of the bright ray crater, see PIA07764. This appears to be a younger feature, as it possesses crisp edges, is not heavily overprinted by other craters and the blanket of bright, fresh material thrown out by the impact is still visible.

Lit terrain seen here is on the moon's anti-Saturn side. North on Rhea (1,528 kilometers, 949 miles across) is up.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 13, 2008. The view was obtained at a distance of approximately 889,000 kilometers (552,000 miles) from Rhea and at a Sun-Rhea-spacecraft, or phase, angle of 31 degrees. Image scale is 5 kilometers (3 miles) per pixel.

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: June 17, 2008 (PIA 10405)
Image/Caption Information
  Crater Comparison
PIA 10405

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