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Phobos
tty
post Oct 14 2007, 05:10 PM
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QUOTE (Ian R @ Nov 21 2006, 01:45 PM) *
Good catch on the splatter pattern Ed. That certainly does look more like a crater chain from a debris or cometary impact.


Now that is interesting. How do you get a splatter pattern/crater chain on a body with essentially zero gravity? It certainly can't be by stuff just falling back to the surface. Anything moving slowly enough to fall back on Phobos probably wouldn't be able to crater a marshmallow.
I suppose a string of debris might stay together well enough to hit Phobos on a subsequent orbit but it seems rather unlikely. It seems at least as likely to be debris coming from an impact on Mars itself.
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elakdawalla
post Oct 14 2007, 06:53 PM
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Wow, Phil, that's a really cool image, thanks for pointing it out!

--Emily


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Stu
post Oct 14 2007, 09:04 PM
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... and add a bit of colour, just 'cos it's Sunday night and there's nothing on telly until Medium comes on...

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nprev
post Oct 15 2007, 03:00 AM
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Great stuff, Phil & Stu!!! Now I know exactly how Phobos must have appeared to the crew of the spacecraft Rolling Stone as it approached Phobos in Heinlein's immortal novel...absent the industrial complexes and filled landing berths, of course... smile.gif

Quick inspiration:

we sense therefore we are

unmanned and alone
solitary robots peer deeply into the Unknown
seeing, tasting, hearing that which no human has yet known,
like a splash of water or blast of radiation
on tender skins

We, safe in the cradle, see vistas dreamed of
yearned for, in our infant dreams
by generations denied their future by tumult,
by the restless and capricious nature of our species
by priorities, set too often by
those who cannot see far horizons,
even through eyes of silicon, gallium arsinide, feed horns and reflectors...

blindness is inexcusable
as the spectrum of the Universe unveils itself, reluctantly,
as bigger than our minds
what challenge, what wonder, can possibly compare?

we must see, at least

in order that someday we may touch


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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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Pygmee
post Oct 15 2007, 08:29 PM
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QUOTE (Phil Stooke @ Oct 14 2007, 03:18 PM) *
Here's a nice new Phobos image from Mars Express, orbit 3909:

[attachment=12280:phob_hrs...bit3909x.jpg]

Phil

Hey Phil, could you tell me where you got the pictures from orbit 3909, because I do find only the raw images until the orbit 3160 on the ESA server...
Thanks a lot
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Phil Stooke
post Oct 15 2007, 08:41 PM
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I found it in the place mentioned in post 30, above.

Phil


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... because the Solar System ain't gonna map itself.
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elakdawalla
post Oct 17 2007, 04:57 PM
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Here's the direct link to the Willner et al. abstract (PDF).

--Emily


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scalbers
post Oct 19 2007, 03:43 PM
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Shall be interesting to see what shape model results Willner et al. are going to present at the November conference.

Seeing that image I wonder who launched that potato into low Mars orbit anyway smile.gif ?


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elakdawalla
post Oct 19 2007, 03:45 PM
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Dr. Willner said I'd need to ask Neukum directly for permission to post that other image, but he pointed out one that had been released on the Web in February (apologies if someone else already posted this elsewhere):

Phobos über der Marsatmosphäre

--Emily


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Stu
post Oct 19 2007, 07:12 PM
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Wow, that's a gorgeous picture of Phobos, thanks for the link Emily... that one passed me by, somehow...

Attached Image


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ugordan
post Oct 19 2007, 07:23 PM
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That picture was around for quite a while now: http://www.unmannedspaceflight.com/index.p...ost&p=84812


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Phil Stooke
post Nov 11 2007, 12:13 AM
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Here are a couple of Mars Express HRSC images of Phobos, from the PDS courtesy of G. Neukum. They have had a bit of extra processing in my usual manner to brighten the terminator area.

Phil

Attached Image


Attached Image


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... because the Solar System ain't gonna map itself.
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scalbers
post Nov 11 2007, 12:16 AM
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That's something with three different orientations of grooves I can see in the top image...


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Tayfun Öner
post Nov 11 2007, 08:17 AM
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It is already gridded, it will be easy for Phil to make us a new model and map. smile.gif
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ilbasso
post Nov 11 2007, 06:48 PM
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At first glance, I thought we were looking at it through a screen door.


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Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com
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