CICLOPS: Cassini Imaging Central Laboratory for OPerationS

Trojan Telesto
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This is Cassini's best look yet at the Trojan moon Telesto (25 kilometers, 16 miles across) which orbits Saturn about 60 degrees ahead of much larger Tethys (1,062 kilometers, 660 miles across). Calypso (21 kilometers, 12 miles across, and not seen here) is the other Tethys Trojan, and trails the larger moon by 60 degrees.

Cassini is able to partly resolve Telesto's shape in this view, but surface features are too small to be visible from this distance.

The image was taken in visible light with the narrow angle camera on May 20, 2005, from a distance of approximately 533,000 kilometers (331,000 miles) from Telesto. The image scale is 3 kilometers (2 miles) per pixel. This view of Telesto has been magnified by a factor of three and sharpened to aid visibility.

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, 2005 (PIA 07546)
Image/Caption Information
  Trojan Telesto
PIA 07546

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