CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Cutting Off Rhea
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Saturn's rings and small moon Prometheus obscure Cassini's view of the planet's second largest moon, Rhea.

Prometheus, which orbits in the Roche Division between the main rings and the thin F ring, can be seen just below the center of the image, in front of Rhea. Lit terrain seen here is on the anti-Saturn side of Prometheus (86 kilometers, 53 miles across) and mostly on the leading hemisphere of Rhea (1528 kilometers, 949 miles across).

This view looks toward the northern, sunlit side of the rings from just above the ringplane.

The image was taken in visible red light with the Cassini spacecraft narrow-angle camera on April 9, 2010. The view was acquired at a distance of approximately 1 million kilometers (621,000 miles) from Prometheus and 1.6 million kilometers (994,000 miles) from Rhea. Image scale is 6 kilometers (4 miles) per pixel on Prometheus and 10 kilometers (6 miles) per pixel on Rhea.

The Cassini Equinox Mission is a joint United States and European endeavor. 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 was designed, developed and assembled at JPL. 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 Equinox Mission visit, and

Credit: NASA/JPL/Space Science Institute
Released: June 23, 2010 (PIA 12661)
Image/Caption Information
  Cutting Off Rhea
PIA 12661

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Alliance Member Comments
enceladus5 (Jun 23, 2010 at 4:39 PM):
nice view of the rings, Rhea, and Prometheus.Cassini does it again!