Moon Images |
Moon Images |
Nov 3 2007, 01:01 PM
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#46
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Many of the "brush strokes" are cracks that radiate from the large impact craters. As for the unusual features in the lower portion of the high resolution image, I always interpreted them as artifacts until the same features showed up in the second closest image. I have heard the theory that Proteus is the reconstituted remains of an old Neptunian moon that was destroyed by Triton's arrival. That may have something to do with it.
One things that helps is that although the closest frame is a single, underexposed frame, the next closest set has four images, and the more distant shots are made using two images. This allows for much more effective noise reduction when compared to the lone Voyager image of Puck. It's dimensions are 440×416×404 km, compared to about 502 km for Enceladus, 480×468.4×465.8 for Miranda, and is a bit larger than Mimas (414.8×394.4×381.4). Ceres also falls in that range (487 km at the equator, 455 km at the poles). Nereid is only ~340 km in diameter, and Larissa comes in at 216×204×164. -------------------- |
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Nov 3 2007, 04:55 PM
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#47
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
I think you mentioned the diameter values for all the bodies except for Ceres, for which the numbers correspond to the radius. I' m almost sure Ceres has twice the size of Proteus, Miranda or Enceladus.
Marc. |
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Nov 3 2007, 05:06 PM
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#48
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Oops, you are right. I remembered an asteroid was in that range, but it is Vesta (578×560×458).
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Nov 5 2007, 04:57 PM
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#49
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Member Group: Members Posts: 655 Joined: 22-January 06 Member No.: 655 |
Think I need to give myself a photoshop tutorial.
Very nice work with the enhancements - great to see even a tiny bit of detail on Nereid (especially since we probably won't be out this way again for 30 or 40 years) |
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Apr 1 2008, 10:31 AM
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#50
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Member Group: Members Posts: 146 Joined: 23-August 06 From: Vriezenveen, Netherlands Member No.: 1067 |
I noticed Steve Albers updated his Ariel map, he improved a bit of Uranus-shine part of Ariel
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Apr 2 2008, 01:22 AM
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#51
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Yes, those are the images I reprocessed for my LPSC presentation.
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Apr 2 2008, 01:44 AM
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#52
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Here are three of the main views.
Here is the LPSC poster. ....And the abstract..... http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1362.pdf -------------------- |
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Apr 3 2008, 11:20 AM
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#53
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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Apr 3 2008, 11:30 AM
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#54
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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Apr 3 2008, 06:32 PM
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#55
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
Wonderful stuff. Especially like the Ariel work.
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Apr 3 2008, 09:04 PM
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#56
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Dragons...now that would be a neat discovery!
Here is my guest blog about it that I wrote during the conference. http://planetary.org/blog/article/00001362/ -------------------- |
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Apr 10 2008, 11:04 AM
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#57
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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Apr 10 2008, 05:15 PM
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#58
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Cool. Are those two more moons to the left of Uranus? Where'd you get the data? Links, please!
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Apr 10 2008, 07:09 PM
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#59
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
The inner one definitely is. The outer one may be a moon and may be a star (I am basing this on image to image motion). I will add that these were taken using the ACS wide field camera. High Resolution Channel images were taken during the transit, but they all missed the planet.
These images are from a large set http://archive.stsci.edu/proposal_search.p...st&id=10805. The datasets involved are: j9q307laq j9q307lbq j9q307lcq j9q307ldq j9q307lfq j9q307lgq j9q307lhq Here are some other sets of HST Uranus data from the same time period (and some Neptune stuff as well, since some of the proposals were mixed). Also, there were a lot of WFPC/2 images taken last year, but those are still proprietary. http://archive.stsci.edu/proposal_search.p...st&id=10870 http://archive.stsci.edu/proposal_search.p...st&id=10534 http://archive.stsci.edu/proposal_search.p...st&id=10473 http://archive.stsci.edu/proposal_search.p...st&id=10502 http://archive.stsci.edu/proposal_search.p...st&id=10170 http://archive.stsci.edu/proposal_search.p...st&id=10102 http://archive.stsci.edu/proposal_search.p...hst&id=9823 http://archive.stsci.edu/proposal_search.p...hst&id=9725 http://archive.stsci.edu/proposal_search.p...hst&id=9035 http://archive.stsci.edu/proposal_search.p...hst&id=9344 -------------------- |
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Apr 10 2008, 07:51 PM
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#60
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Here's the Solar System Simulator view. Looks like the inner dot is Miranda; the outer one must be a star as there's no other moon that's close.
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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