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Four of Saturn's many and varied moons crowd this single frame from Cassini.
Reflected light from Saturn (out of frame to the lower left) partly illuminates three of the moons: Tethys (1,062 kilometers, 660 miles across, at upper right), Janus (179 kilometers, 111 miles across, at lower left) and Epimetheus (113 kilometers, 70 miles across, below and left of center). Enceladus (504 kilometers, 313 miles across) shows merely a slim crescent below center.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 17, 2006, at a distance of approximately 3.7 million kilometers (2.3 million miles) from Saturn. The image scale is 27 kilometers (17 miles) per pixel on Tethys, 21 kilometers (13 miles) per pixel on Enceladus, and 22 kilometers (14 miles) per pixel on Janus and Epimetheus.
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.