HiRISE images of Phobos!, "images available NOW". |
HiRISE images of Phobos!, "images available NOW". |
Apr 12 2008, 12:10 AM
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#46
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Senior Member Group: Members Posts: 2998 Joined: 30-October 04 Member No.: 105 |
On the NASA/HiRISE website there is a map of the Phobos (Phobian??) lineations on (evidently) a cylindrical projection. Interesting relationship between the lineations and leading/trailing hemispheres.
phobos_map_grooves_lg.png I'll bet that the origin of the lineations is post-capture or post tidal-lock. --Bill -------------------- |
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Apr 12 2008, 12:17 AM
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#47
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Member Group: Members Posts: 111 Joined: 14-March 05 From: Vastitas Borealis Member No.: 193 |
Then you could get the images the right distance apart for a non-exaggerated effect. I'm sure this could be illustrated with ordinary non-movable crops of, say, the near rim of Stickney Here goes. Full resolution x-eye image depicting the crater bottom and parts of the near/far rims. I'm using StereoPhotoMaker for zooming and panning the images. It's really beyond my capabilities to do anything more than crop some samples with it. |
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Apr 12 2008, 02:10 AM
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#48
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
image depicting Stickney's bottom Now, now, there'll be none of that on this site. -------------------- If Occam had heard my theory, things would be very different now.
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Apr 12 2008, 02:11 AM
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#49
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Solar System Cartographer Group: Members Posts: 10153 Joined: 5-April 05 From: Canada Member No.: 227 |
You're no fun any more, EGD.
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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Apr 12 2008, 07:11 AM
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#50
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
"... image depicting Stickney's bottom ..."
Asaph Hall's GHOST will haunt you for that! |
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Apr 12 2008, 01:40 PM
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#51
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Ed, I can only call that a Phobic response...
I'm not even gonna comment on the fact that Marswiggle's excellent x-eye revealed a large pile on the bottom. <puts on blindfold, lights cigarette, waits patiently for the machine gun to fire> -------------------- 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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Apr 13 2008, 08:31 AM
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#52
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
"... can only call that a Phobic response..."
(quietly inflates a balloon, steps to 1 foot from the blindfolded victim, and "needles" the balloon) |
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Apr 13 2008, 09:37 AM
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#53
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Newbie Group: Members Posts: 13 Joined: 23-March 08 Member No.: 4072 |
Hi everyone, Images from MRO are fantastic. I'd like to share some especulations about some Phobos features. The bright zone at the rim of Stickney coincide perfectly with the point in Phobos closer to Mars (or the central point as seen from Mars). At the same time, it's also the point with more tidal effect in Phobos or less gravity in the surface. I guess both facts (brightness and less gravity) should have some kind of relationship. Same happens with the opposite side, in which tidal effect is also maximized. Because of tidal effect of Mars, close to this area gravity forces are not normal to the surface, but with a small inclination in direction to Mars, that is, some very small drag forces are in Phobos's surface in the direction to that bright zone. In the images I can see some dragged terrain or small attempts of avalanches in that direction (could it be this effect?). In case of a big impact that shakes Phobos, the preference point to loose material into space should also be that point (could it be the reason for the bright zone?). Grooves have also the direction and seems to converge to the maximal tidal effect zones. Because of the elongated aspect of Phobos, just before it got tidally locked to Mars there should have been a period in which it swung over the actual equilibrium point. In that period, those swings surely produced short time variations of drag forces in the surface due to tidal effects (could this be a reason for the grooves?). Thanks |
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