CICLOPS: Cassini Imaging Central Laboratory for OPerationS
Dione Below

Dione Below
PIA 09838

Avg Rating: 8.72/10

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  Cassini looks down from high latitude over Dione and the system of wispy fractures that coats the moon's trailing side.

This view looks toward Dione (1,123 kilometers, 698 miles across) from 43 degrees above the equator. North is up.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 14, 2008. The view was acquired at a distance of approximately 938,000 kilometers (583,000 miles) from Dione and at a Sun-Dione-spacecraft, or phase, angle of 54 degrees. Image scale is 6 kilometers (3 miles) per pixel.

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.

For more information about the Cassini-Huygens mission, visit and the Cassini imaging team home page,

Credit: NASA/JPL/Space Science Institute
Released: February 15, 2008 (PIA 09838)
Image/Caption Information

Alliance Member Comments
Mercury_3488 (Feb 17, 2008 at 11:12 AM):
A distant but still a nice view of the very interesting Saturn moon Dione.

I am currently doing a project in my spare time comparing Dione with the Uranus moon Ariel.

Reason being is that both Ariel & Dione are very similar in mass, density & size (Ariel slightly larger in all counts but still very similar). Also both appear to have undergone interesting geological changes
& both may stil be active in a small way.

Many similarities have come to light.

Both appear to contain approx 50% ice / rock.
Both have similar densities: Dione: 1.5 g cm/3. Ariel: 1.6 g cm/3.
Both are very simialr is size. Dione: 1,118 KM across, Ariel: 1,158 KM across.

Both have canyons, although Ariel's are wider, but both moon's canyons are of a similar form & alignment characteristics.

Ariel has tall mountains, where as Dione does not. That is one fundamental difference between the two. Both have however smoother areas with smaller craters as well as more primitive areas that are more heavily cratered.

The Dione from above image will help in my 'research'.

Andrew Brown.