Capture of Phobos and Deimos, Paper AAAS - 57725 by Geoffrey Landis |
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Capture of Phobos and Deimos, Paper AAAS - 57725 by Geoffrey Landis |
 May 24 2009, 01:19 AM
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#16
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 Merciless Robot  Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602  |
What's interesting about Mars wrt tidal dynamics is that it has one pronounced bump: the Tharsis Bulge. It's apparently a fairly recent feature (<1 By), but it would be useful to understand its effect on the planet's Milankovitch cycles as well as on the orbital evolution of Phobos & Deimos.
-------------------- 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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May 24 2009, 11:13 AM
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#17
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Junior Member Group: Members Posts: 47 Joined: 27-December 07 Member No.: 3991 |
Could the grooves on Phobos be fracture marks from actually being shattered by the Stickney impact but only gently moving apart a little only to meld back together?
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May 24 2009, 04:37 PM
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#18
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 Senior Member Group: Members Posts: 1417 Joined: 26-July 08 Member No.: 4270 |
Full inline quote removed
I'm no expert, but I would say it is possible. Some of the newer images of Phobos show that the lines appear to be composed of several small craters. Or at least that my interpretation of it. -------------------- -- Hungry4info (Sirius_Alpha)
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May 24 2009, 10:29 PM
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#19
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 Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
craters or sinkholes?
-------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Sep 8 2009, 09:46 PM
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#20
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
QUOTE Some of the newer images of Phobos show that the lines appear to be composed of several small craters they don't look like strings of craters to me .More like stress fractures an isis remapped image of ( PSP_007769_9015_BG13.cub ) to the shape model i am working on  |
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Sep 8 2009, 10:42 PM
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#21
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Member Group: Members Posts: 910 Joined: 4-September 06 From: Boston Member No.: 1102 |
Welcome JohnVV! Really impressive first post. It is interesting that the groves in the top half of your projection run horizontally (east-west??) and those in the lower half run perpendicular/vertically. Almost seems like the bottom half of Phobos got rotated 90 degrees.
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Oct 1 2009, 05:10 AM
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#22
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
QUOTE and those in the lower half run perpendicular/vertically. Almost seems like the bottom half of Phobos got rotated 90 degrees. that is just from the shape model in ISIS3 that i made " ShapeModel = $base/dems/PhobosShapeNew.cub " using the default lat/long from spiceinit here it is without the "ShapeModel = Null ", and lat/long corrected with "qtie"  not mapped  |
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Oct 25 2009, 08:52 PM
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#23
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Junior Member Group: Members Posts: 79 Joined: 11-September 09 Member No.: 4937 |
QUOTE (john_s @ Mar 29 2009, 11:30 AM)  A harder question for the capture hypothesis, I think, is why the inclination of the orbits is so low (1.1 and 1.8 degrees for Phobos and Deimos respectively). John. Could the large changes in obliquity be a factor? I've read that Earth's obliquity varies little because the Moon acts as an anchor -- so does the reverse hold as well? |
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Dec 11 2009, 11:52 AM
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#24
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Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
never mind
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