new Dione images, from T21, Dec. 2006 |
new Dione images, from T21, Dec. 2006 |
Dec 18 2006, 01:29 AM
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#1
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Beautiful new images of Dione... I like the small patch of (fairly) smooth plains near the terminator, and the long ridge.
http://saturn.jpl.nasa.gov/multimedia/imag...6/N00073141.jpg Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Dec 18 2006, 03:15 AM
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#2
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
This is a composite of two of the new frames, enlarged 2x. There is very faint Saturnshine on the dark side.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Dec 18 2006, 03:26 AM
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#3
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Only a tiny sliver will be new territory for Steve's map. The rough terrain at right, clearly different from the smoother area at the terminator, is the ejecta blanket of the big southern hemisphere basin.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Dec 19 2006, 12:46 AM
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#4
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Junior Member Group: Members Posts: 48 Joined: 8-December 05 Member No.: 603 |
I'm surprised noone's commented on this picture of Dione taken on the 15th. Very provocative.
Maybe something, maybe not. http://saturn.jpl.nasa.gov/multimedia/imag...6/N00073136.jpg |
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Dec 19 2006, 03:08 AM
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#5
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Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
I viewed the image full size, and it appears the vertical streaks are all parallel and not diverging or radial to Dione. Also, there appears to be a large diffuse ring of scattered light in the picture. Additionally, the notorious horizontal banding we saw in the Cassini first ring passage are evident.
I am not a skilled photo analyst, but I reluctantly suspect this picture doesn't show anything exciting. |
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Dec 19 2006, 08:13 AM
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#6
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
I am not a skilled photo analyst, but I reluctantly suspect this picture doesn't show anything exciting. I second that. This is typical of scattered light when the bright object (bright actually depending solely on the exposure used) is located just outside of the frame. -------------------- |
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Dec 19 2006, 07:32 PM
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#7
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
"I am not a skilled photo analyst, but I reluctantly suspect this picture doesn't show anything exciting."
I also agree. However, I think this picture shows that they are still looking for a dionean plume. Marc. |
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Dec 19 2006, 07:36 PM
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#8
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
It wouldn't be far-fetched to suggest they merely missed the moon. It was known to happen before. The NAC imposes pretty tight pointing constraints. Looking for a plume at such a low phase wouldn't be very effective mainly due to this scattered light stuff.
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Dec 19 2006, 08:00 PM
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#9
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
So why are there 2 pictures like that, one of which is over-exposed ?
http://saturn.jpl.nasa.gov/multimedia/imag...6/N00073135.jpg The other pictures all catched perfectly Dione. Sorry, I'm just trying to keep my hopes alive !! Marc. |
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Dec 19 2006, 08:19 PM
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#10
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
So why are there 2 pictures like that, one of which is over-exposed ? http://saturn.jpl.nasa.gov/multimedia/imag...6/N00073135.jpg The other pictures all catched perfectly Dione. Sorry, I'm just trying to keep my hopes alive !! Marc. Not sure why those images were mistargeted, may have something to do with the fact that those were taken while riding along with VIMS. But given the phase angle of those images, I'd have to agree with ugordan. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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