File:Dione Passing Tethys PIA12534.jpg

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English: From the Cassini spacecraft's perspective, Saturn's moon Dione passes in front of the moon Tethys in this mutual event.

These three images were each taken about one minute apart. These images are part of a mutual event sequence in which one moon passes close to or in front of another. Such observations help scientists refine their understanding of the orbits of Saturn's moons.

Brightly lit terrain seen here is on the anti-Saturn side of Dione (1,123 kilometers, or 698 miles across) and between the leading hemisphere and anti-Saturn side of Tethys (1,062 kilometers, or 660 miles across). The large Odysseus Crater is visible on Tethys. Tethys is 2.6 million kilometers (1.6 million miles) from Cassini. Dione is 2.2 million kilometers (1.4 million miles) away.

Sunlight reflected by Saturn, which is out of the frame to the right, is lighting up the side of Tethys that is away from the Sun, but due to the spacecraft's viewing angle and the relative positions of each body, this is not true for Dione.

The images were taken in visible light with the Cassini spacecraft narrow-angle camera on Nov. 28, 2009. Scale in the original images was 13 kilometers (8 miles) per pixel on Dione and 16 kilometers (10 miles) per pixel on Tethys. The images were contrast enhanced and magnified by a factor of 1.5 to enhance the visibility of surface features.
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Source http://photojournal.jpl.nasa.gov/catalog/PIA12534
Author NASA/JPL/Space Science Institute
This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA12534.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current21:18, 25 January 2010Thumbnail for version as of 21:18, 25 January 20101,463 × 489 (18 KB)Captain-tucker (talk | contribs){{Information |Description={{en|1=From the Cassini spacecraft's perspective, Saturn's moon Dione passes in front of the moon Tethys in this mutual event. These three images were each taken about one minute apart. These images are part of a mutual event s

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