Miranda: Verona Rupes |
Miranda: Verona Rupes |
Aug 31 2012, 11:51 PM
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#1
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
Hi...just wondering if anyone has a reliable source for the height of Miranda's spectacular Verona Rupes fault scarp? Estimates for the height range from 5 km to 20 km.
Thanks, --Phil -------------------- Twitter: @philna | seattle.wa.usa
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Sep 3 2012, 12:11 PM
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#2
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
Well... Ask Phil Stooke, the "other Phil". He might know, having cartographed already most bodies of the solar system...
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Sep 4 2012, 10:13 PM
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#3
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
I see...thanks for the suggestion.
--Phil -------------------- Twitter: @philna | seattle.wa.usa
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Sep 4 2012, 10:45 PM
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#4
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Solar System Cartographer Group: Members Posts: 10251 Joined: 5-April 05 From: Canada Member No.: 227 |
Hi - you'll have to wait until I get back from my current trip (I'm in the Irish Sea right now). When I have access to my stuff I'll see what I can find.
Verona Rupes is not vertical, it's a talus slope at angle of repose, so there may be differences between estimates of slope length versus actual depth. I had an LPSC abstract on that topic back in the Jurassic Period. 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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Sep 5 2012, 12:25 AM
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#5
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Senior Member Group: Members Posts: 1597 Joined: 14-October 05 From: Vermont Member No.: 530 |
Verona Rupes is not vertical, it's a talus slope at angle of repose I always wondered about that. I thought it looked suspiciously slope-like. Now I feel cheated-- what fun would be tumbling down low-G scree?? I always envisioned jumping off it and very slowly falling. I supposed I should adjust my vision to dropping a boulder off the top and creating a massive yet extremely slow avalanche/slough. |
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Sep 6 2012, 01:47 AM
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#6
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
Very interesting Phil. I'd like to see your estimate of the slope angle and your abstract, if you're able to share it. Verona Rupes has a somewhat mythic reputation and much of the information about its depth is rather inconsistent. This is surprising given the exceptional quality of the 1986 Voyager 2 photos.
Thanks, --Phil -------------------- Twitter: @philna | seattle.wa.usa
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Sep 7 2012, 09:00 PM
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#7
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Solar System Cartographer Group: Members Posts: 10251 Joined: 5-April 05 From: Canada Member No.: 227 |
Exceptional quality, yes, but no stereo coverage of this area of Miranda, so no topography.
I'll be back home in a week... just south of Iceland at the moment... 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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Sep 7 2012, 10:16 PM
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#8
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Member Group: Members Posts: 447 Joined: 1-July 05 From: New York City Member No.: 424 |
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Sep 19 2012, 08:16 PM
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#9
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Solar System Cartographer Group: Members Posts: 10251 Joined: 5-April 05 From: Canada Member No.: 227 |
Here is my 1991 LPSC abstract about Miranda.
http://www.lpi.usra.edu/meetings/lpsc1991/pdf/1667.pdf I can't believe I've been doing this for over 20 years... 26 actually as my first LPSC was in 1986. 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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Sep 19 2012, 09:31 PM
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#10
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Member Group: Members Posts: 241 Joined: 16-May 06 From: Geneva, Switzerland Member No.: 773 |
I read this abstract many times Phil. This is the best study of the inter-coronae regions I have found so far. This geological map of Miranda is just great. I do not think that I will again see another mission to Uranus and it's amazing moons in my life (even if I'm "just" 42 !!). Maybe I'm too pessimistic !
Best Regards, Marc. |
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Sep 27 2012, 07:17 PM
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#11
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
Thanks, Phil! ...I just returned fom vacation and found your abstract post. So the cliffs are likely more like 5 - 15 km. Would the base of the cliffs be filled a sloping mass of ice/rocky talus? I wonder how far this would spread out in low-g.
BTW, the abstract is now 404. Thanks, --Phil -------------------- Twitter: @philna | seattle.wa.usa
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Oct 10 2012, 01:04 AM
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#12
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
check out this post for a year or so ago . . .
http://stereomoons.blogspot.com/2009/09/mi...as-warning.html Includes global map and topography of the south. I suppose i should write this up one of these days with some actual measurements and stuff . . . -------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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Oct 13 2012, 11:31 PM
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#13
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
The video and still projections are fantastic! It looks like you're landing north of the Alonso crater near where Argiers and Verona Rupes meet. It would be interesting to to see this as a spherical projection, if you get around to it someday.
BTW, do you know if there's any evidence suggesting that Miranda is experiencing active cryovolcanism? It's such tortured terrain - reminds me of Enceladus. I realize Voyager 2 did not detect any plumes and that only half the satellite was imaged. Could ground-based telescopes have picked up the telltale traces of ammonia around Miranda? Oh, also, would you happen to know where I can find more info about how Miranda is interacting with the Uranian magnetosphere and radiation belts? (Disclaimer: I'm a software designer with a b/g in astronautics. When it comes to planetary science, I'm an enthusiatic noob and simply interested in learning.) Thanks again, --Phil -------------------- Twitter: @philna | seattle.wa.usa
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Oct 13 2012, 11:52 PM
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#14
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Merciless Robot Group: Admin Posts: 8789 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Shooting from the hip, here, I'd call active cryovulcanism unlikely in the modern era. Both the primary body & the other moons are significantly less massive than Jupiter & Saturn (and their own moons), so the tidal forces are correspondingly less as well.
Uranus clearly experienced something during its wild youth; a 98 deg polar inclination doesn't happen for nothing. The fact that its rings & moons are all equatorally coplanar implies that they formed after this event, whatever it was. But I suspect that this was the last & most significant energetic event that ever happened there cause, baby, it's COLD outside. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 16 2012, 11:14 PM
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#15
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Newbie Group: Members Posts: 8 Joined: 9-August 12 From: Seattle, Washington (USA) Member No.: 6517 |
Shooting from the hip, here, I'd call active cryovulcanism unlikely in the modern era. Both the primary body & the other moons are significantly less massive than Jupiter & Saturn (and their own moons), so the tidal forces are correspondingly less as well. Uranus clearly experienced something during its wild youth; a 98 deg polar inclination doesn't happen for nothing. The fact that its rings & moons are all equatorally coplanar implies that they formed after this event, whatever it was. But I suspect that this was the last & most significant energetic event that ever happened there cause, baby, it's COLD outside. True...and I think that's been the conventional thinking about the Uranian system. However, just today, this was posted on the Planetary Society blog regarding findings reported at the DSPS 2012 meeting: http://www.planetary.org/blogs/emily-lakda...4-dps-day1.html "...Uranus has a blue ring analogous to Saturn's E ring, which is of course supplied by Enceladus' geysers. Uranus' ring is associated positionally with the satellite Mab, which is way too tiny to have any hope of Enceladus-like activity. She suggested that there has been migration of the moons and/or ring material and that Ariel could originally have been the source and may relatively recently have been geologically active." Admittedly, Ariel is 20x more massive than Miranda (which is 1.5x less massive than Enceladus). Interesting... -------------------- Twitter: @philna | seattle.wa.usa
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