CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Small But Effective
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Tiny Daphnis' impact on the Keeler gap in which it resides can be seen in this image from Cassini.

Daphnis (8 kilometers, 5 miles across) makes waves in the edge of the Keeler gap as it orbits. PIA09812 shows Daphnis and Pan, another shepherding moon, creating their perturbations on the rings.

This view looks toward the unilluminated side of the rings from about 40 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 11, 2009. The view was acquired at a distance of approximately 1 million kilometers (627,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 44 degrees. Image scale is 6 kilometers (4 miles) per pixel.

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: February 16, 2009 (PIA 10579)
Image/Caption Information
  Small But Effective
PIA 10579

Avg Rating: 9.17/10

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Alliance Member Comments
Dragon_of_Luck_Mah_Jonng1971 (Feb 16, 2009 at 11:57 AM):
These many waves created by Daphnis are very remarkable because the moonlet causing them is tiny - only 5 miles across.

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