Ceres Low-Altitude Mapping Orbit (LAMO) |
Ceres Low-Altitude Mapping Orbit (LAMO) |
Mar 16 2016, 02:13 AM
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#121
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
There are so many oddities of these impact "ejecta blankets" that I tend to think additionally of caldera "effusive blankets". These are the heady days of data collection; we still need to sit back and model processes.
--Bill -------------------- |
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Mar 18 2016, 07:37 PM
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#122
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
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Guest_Steve5304_* |
Mar 18 2016, 08:43 PM
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#123
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Guests |
when do we see Spot 5. I can't wait at that sort of resolution my imagination is going nuts
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Mar 19 2016, 01:28 AM
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#124
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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Mar 21 2016, 03:58 PM
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#125
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Solar System Cartographer Group: Members Posts: 10151 Joined: 5-April 05 From: Canada Member No.: 227 |
Hot from LPSC - we were shown a well-exposed image of the large bright spot in Occator. It has central fractured dome surrounded by a shallow discontinuous 'moat' and slightly elevated outer parts. It is bright, but not ice, so some kind of salt or bright mineral.
I expect there will be a release soon, as it has now been shown. 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 PD: 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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Mar 21 2016, 04:16 PM
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#126
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Senior Member Group: Members Posts: 2082 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Low res pic from someone in the room (for those who can't wait)
https://twitter.com/Laurent_Montesi/status/...938488300515328 |
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Mar 22 2016, 04:12 AM
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#127
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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Mar 22 2016, 05:25 PM
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#128
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Among today's image release is a large mosaic of Occator crater showing exquisite detail.
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Mar 22 2016, 05:26 PM
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#129
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Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
Low res pic from someone in the room (for those who can't wait) High res mosaic http://photojournal.jpl.nasa.gov/jpeg/PIA20350.jpg -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Mar 22 2016, 05:50 PM
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#130
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Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
So, basically, there's a bright white mountain in the centre of the crater. I'd like to get an oblique view of that..
I am also reminded of Enceladus, though it was the similarity of the central dome to craters like that that struck me. -------------------- |
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Mar 22 2016, 07:18 PM
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#131
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Member Group: Members Posts: 555 Joined: 27-September 10 Member No.: 5458 |
Haven't used this process for a while but here is a blink animation I did a long while back for sub-pixeling an image of Occator in Survey Orbit.
The image is blinking between the original cropped view from Survey Orbit #16, the sub-pixeling version and finally Occator in LAMO. The final LAMO image has been skewed because the original image of SO was somewhat oblique in view. I'm rather intrigured so many details seem to remain consistent while others seem present but shifted due to the nature of the original low resolution. -------------------- |
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Mar 22 2016, 08:50 PM
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#132
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
The spots a fumaroles, unremarkable except for their size and presumably duration of activity. Even then, the whole Occator region is remarkable.
https://univ.smugmug.com/Dawn-Mission/Ceres...phology--v1.png --Bill -------------------- |
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Mar 22 2016, 09:38 PM
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#133
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
Looks almost like lava/mud flow at the edges of the PIA20350 where it appears to have pooled up and cooled as the level raised against the terrain barrier, forming the raised edge at the pool boundaries.
Also dont miss the enhanced color version. |
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Mar 22 2016, 09:49 PM
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#134
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
Wonderful, and finally, Occator in exquisite detail. To backtrack a bit, the impact hypothesis is out, and the idea of water ice seem less likely now.
So salt is the winner, salts that have built up around fumaroles that carry salty water from the interior or Ceres. Several images including one in colour linked from this page. |
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Mar 23 2016, 12:13 AM
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#135
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Junior Member Group: Members Posts: 66 Joined: 26-May 06 Member No.: 790 |
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