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Cassini, Saturn moon photographer

Date:
May 3, 2012
Source:
NASA/Jet Propulsion Laboratory
Summary:
NASA's Cassini spacecraft successfully flew by Saturn's moons Enceladus and Dione during close flybys on May 2, 2012, capturing these raw images. The flybys were the last close encounters of these icy moons that Cassini will make for three years.
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This raw, unprocessed image was taken by NASA's Cassini spacecraft on May 2, 2012. The camera was pointing toward Enceladus at approximately 239,799 miles (385,919 kilometers) away.
Credit: NASA/JPL/Space Science Institute

NASA's Cassini spacecraft successfully flew by Saturn's moons Enceladus and Dione during close flybys on May 2, 2012, capturing these raw images. The flybys were the last close encounters of these icy moons that Cassini will make for three years.

Cassini flew by Enceladus at an altitude of about 46 miles (74 kilometers). This flyby was designed primarily for the radio science sub-system to measure variations in Enceladus' gravity field.

On approach to Enceladus, Cassini's cameras imaged the icy satellite's south polar plume, which consists of jets of water ice, water vapor and organic compounds sprayed into space from the moon's famed "tiger stripe" fractures. The plume images were captured at distances ranging from 259,000 miles (416,000 kilometers) down to 66,000 miles (106,000 kilometers) when Enceladus was just a thin crescent and the plume was backlit.

During closest approach, the radio science team looked for a concentration of mass at the south pole that could indicate sub-surface liquid water or an intrusion of warmer-than-average ice that might explain the intriguing geologic activity at the south pole. After the closest approach, the composite infrared spectrometer obtained a map of Enceladus' sun-lit side while Cassini's visible light cameras rode along and captured several images of the moon's leading hemisphere at resolutions of about 1,500 feet (450 meters) per pixel.

Later this month, a close encounter with Titan on May 22 will pitch the spacecraft up out of the equatorial plane and into a nearly three-year-long phase of inclined orbits that will showcase the northern and southern reaches of Saturn. On March 9, 2013, Cassini will make a close pass by Rhea, but the spacecraft won't have another close, targeted encounter with any of Saturn's other icy satellites until June 2015, when it encounters Dione. Cassini will make its next flyby of Enceladus on Oct. 14, 2015.

For information about Cassini, visit: http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov .

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency, and the Italian Space Agency. NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the mission for NASA's Science Mission Directorate, Washington, D.C. The imaging team is based at the Space Science Institute, Boulder, Colo. JPL is a division of the California Institute of Technology, Pasadena.


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The above post is reprinted from materials provided by NASA/Jet Propulsion Laboratory. Note: Materials may be edited for content and length.


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NASA/Jet Propulsion Laboratory. "Cassini, Saturn moon photographer." ScienceDaily. ScienceDaily, 3 May 2012. <www.sciencedaily.com/releases/2012/05/120503095135.htm>.
NASA/Jet Propulsion Laboratory. (2012, May 3). Cassini, Saturn moon photographer. ScienceDaily. Retrieved June 30, 2015 from www.sciencedaily.com/releases/2012/05/120503095135.htm
NASA/Jet Propulsion Laboratory. "Cassini, Saturn moon photographer." ScienceDaily. www.sciencedaily.com/releases/2012/05/120503095135.htm (accessed June 30, 2015).

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