New Iapetian image series |
New Iapetian image series |
Sep 11 2006, 09:27 PM
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#1
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Member Group: Members Posts: 288 Joined: 28-September 05 From: Orion arm Member No.: 516 |
Hi,
CASSINI has transmitted 184 pics (!) over the last days. Here five takeouts, 3-4x enlargement: Date: 2009-09-06 Distance: 2.228.548 km Filters: CL1 and CL2 Date: 2009-09-08 Distance: 3.215.284 km Filters: P120 and GRN Date: 2009-09-08 Distance: 3.216.610 km Filters: P60 and GRN Date: 2009-09-09 Distance: 3.390.271km Filters: P60 and GRN Date: 2009-09-09 Distance: 3.427.313 km Filters: P120 and GRN Maybe somebody is able to combine some of those images to show more details. Bye. |
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Apr 2 2007, 06:06 PM
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#2
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
From the latest PDS batch, here's an approx. natural color composite of Iapetus from June 2006 and alongside it a view from November 2005 showing almost the same hemisphere, but with different illumination:
Both images magnified 2x from original pixel scales. -------------------- |
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Apr 2 2007, 07:35 PM
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#3
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
From the latest PDS batch, here's an approx. natural color composite of Iapetus from June 2006 and alongside it a view from November 2005 showing almost the same hemisphere, but with different illumination: [image] Both images magnified 2x from original pixel scales. You know, I think this image pair (and/or others like it) could be incredibly useful to help answer the question of what is going on with Iapetus, but ordinary eyeball power isn't sufficient to help. Basically, the second image gives us a lot of information about the relief of Snowman-A, while the first image gives us an albedo map. The nontrivial task of correlating the two could offer some important insights. This is one of the few places on Iapetus where the first-order model of Cassini Regio (an ellipse with fuzzy northern and southern borders) can be seen to break down on a macroscopic scale, in concert with relief. So what is happening? Is the eastern slope of Snowman-A's central peak light or dark? What about the inside rims? The outside rims? There are some possible answers here that would offer definitive rejection of some theories for the origin of CR. For example, if there's a relief feature with dark stuff on the eastern slope but white terrain on the western slope, then the theory that something is swept up as it strikes Iapetus's leading side is seemingly refuted. |
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