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Saturn's moon Janus obscures part of the planet's A ring as Cassini looks toward the main rings and the thin F ring.
Janus (179 kilometers, 111 miles across) appears as a dark oval to the left of the center of the image. A star can also be seen on the right of the image, beyond the thin F ring.
This view looks toward the northern, sunlit side of the rings from just above the ringplane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 21, 2011. The view was acquired at a distance of approximately 2.6 million kilometers (1.6 million miles) from Janus. Image scale is 15 kilometers (10 miles) per pixel.
The Cassini Solstice 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.