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Fraser
2005-Dec-07, 03:36 AM
SUMMARY: This Cassini photo shows two of Saturn's moons, Dione and Enceladus floating just beneath the ringplane. Smaller Enceladus is on the right, and measures 505 kilometers (314 miles across). Dione is further away at the top left, and measures 1,126 kilometers (700 miles across). This image was taken on October 15, 2005, when Cassini was 2.1 million kilometers (1.3 million miles) from Dione and 1.5 million kilometers (900,000 miles) from Enceladus.

View full article (http://www.universetoday.com/am/publish/dione_enceladus.html)
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menkalinan
2005-Dec-08, 02:29 PM
Hi Fraser!

In the summary you write:


Smaller Enceladus is on the right, and measures 505 kilometers (314 miles across). Dione is further away at the top left, and measures 1,126 kilometers (700 miles across). This image was taken on October 15, 2005, when Cassini was 2.1 million kilometers (1.3 million miles) from Dione and 1.5 million kilometers (900,000 miles) from Enceladus.

But if the moon at the top left would be Dione and it was 1.4 times more distant than Enceladus, it still should appear about 60% bigger than Enceladus, as Dione has more than twice the diameter. I also can't find the moons associated with their names in the original press release.

Nevertheless, thank you for your continous supply of these beautiful Moon-Ensembles. I wish, Cassini would have a stereo camera aboard - the images would be fascination to watch with these red/blue glasses!

Greetings,

Erik