Rev 141: Titan, distant view after the storm |
Rev 141: Titan, distant view after the storm |
Dec 2 2010, 10:22 PM
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Member Group: Members Posts: 699 Joined: 1-April 08 From: Minnesota ! Member No.: 4081 |
“On December 5, ISS will image a half-phase Titan at a distance of 2.5 million kilometers (1.55 million miles). The camera will image the sub-Saturn hemisphere of the satellite, allowing researchers to continue to study the recent weather changes that have been occurring across Titan's equatorial region and that have brought methane rain to select regions of previously dry terrain”.
Seems a shame the NAC or WAC couldn’t take a few images before Dec 5th say on the second. Based on the SSS it would seem the area in S Senkyo (around 310 W and -20 ) that almost certainly had intense precipitation is better seen on the 2nd below left, and may be beyond the terminator and invisible on the 5th below on right. Also I couldn't confirm with the SSS that Titan would be as close as 2.5 Mkm on the 5th ??? |
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Jan 19 2011, 12:52 AM
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Member Group: Members Posts: 699 Joined: 1-April 08 From: Minnesota ! Member No.: 4081 |
While talking about the S Polar storm and subsequent appearance of lakes in above post I was curious what the Cassini flyby (Ta) saw in the raw images from Oct 2004. One of the best (taken Oct 25, 2004) is shown below (left image panel A) and compared with those of Schaller et al had taken two days before (Oct 23 panel 'B') with Keck adaptive optics. This polar storm was massive (see the Oct 8 Keck image) and was rapidly dissipating when Cassini flew by. Placing a celestia grid to locate the storm residual cloud puts it over the precise area where the lakes were noted in 2005 (see polar projection figure right) suggesting the October 2004 storm was the source of the new lakes.
The interesting Schaller, Brown, Roe and Bouchez paper can be found here. http://www.gps.caltech.edu/~mbrown/papers/ps/largecloud.pdf |
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