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Dione Flyby (D-2) - April 7, 2010

Dione Flyby (D-2) - April 7, 2010

Apr. 07, 2010

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Highest Resolution View of Dione
  This very detailed image taken during the Cassini spacecraft's closest approach to Saturn's moon Dione on Dec. 14, 2004 is centered on the wispy terrain of the moon.
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Dione 'D-2' Flyby: Search for Activity

Cassini swooped down to within about 500 kilometers (311 miles) of Dione to 'sniff' the moon. Particle and fields instruments will try to determine if Dione is actively spewing particles.

The Composite Infrared Spectrometer (CIRS) began observations on the approach to this Dione flyby by making a map of the satellite while Dione is in Saturn’s shadow, so the heat from the sun is not measured, but any heat from Dione is gauged. The Ultraviolet Imaging Spectrograph (UVIS) and Visible and Infrared Mapping Spectrometer (VIMS) also imaged Dione. The Cassini Plasma Spectrometer then took control for closest-approach to observe the interaction between Dione and Saturn's magnetosphere, with most of the other instruments also taking data. UVIS then mapped Dione’s surface albedo in ultraviolet to measure composition, while other Optical Remote Sensing instruments obsered the terrain. The Imaging Science Subsystem (ISS) followed UVIS to do a 20-panel mosaic with the other remote sensing instruments also taking data, to get compositional, thermal and geological information about Dione’s sub-Saturnian hemisphere.

Related Links:

Cassini Finishes Saturnian Doubleheader - April 12, 2010

Cassini Doubleheader: Flying By Titan and Dione - April 2, 2010

Dione-2 Flyby Animation

Dione Flyby at a Glance
Dione Flyby
April 7, 2010 (SCET)

503 kilometers (313 miles)

8.4 km/sec (19,000 mph)

+ Quick Look PDF (399 KB)

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