closing in on the origin of Marsâ€™ larger moon

JonClarke · Oct 16, 2008

Lots of great images and interesting possibilities on the composition, structure, and origin of Phoboshttp://www.esa.int/SPECIALS/Mars_Express/SEM8MUSG7MF_0.html <div class="Discussion_UserSignature"> Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars Arthur Clarke </div>

3488 · Oct 16, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Lots of great images and interesting possibilities on the composition, structure, and origin of Phoboshttp://www.esa.int/SPECIALS/Mars_Express/SEM8MUSG7MF_0.html Posted by jonclarke</DIV>Thank you very much Jon.I still favour the captured type D asteroid model, very similar to many of the asteroids in outer part of the Asteroid Belt & Jupiter's far flung companions such as Carme, Pasiphae, etc.The images are incredible. I will be back later to contribute my own crops & enlargements here. WOnder when we will see the MARSIS data too. The porousity of the bulk of Phobos & ever increasing accurate density of Phobos will reveal so much.I think it is time for a very close pass of Deimos too, to repeat the same observations there. Dunno if Mars Express can reach that far out?Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

JonClarke · Oct 16, 2008

I don't know either.  I would depend on how much propellant MExhas left.  Maybe at the end of the mission?.  Jon <div class="Discussion_UserSignature"> Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars Arthur Clarke </div>

silylene old · Oct 16, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Lots of great images and interesting possibilities on the composition, structure, and origin of Phoboshttp://www.esa.int/SPECIALS/Mars_Express/SEM8MUSG7MF_0.html Posted by jonclarke</DIV> Wow, thanks for the link , and a new desktop photo ! <div class="Discussion_UserSignature"> <div class="Discussion_UserSignature" align="center">- - - - - - - - - - - - - - - - - - - - - - </div><div class="Discussion_UserSignature" align="center">I really, really, really miss the "first unread post" function. </div> </div>

JonClarke · Oct 17, 2008

The rubble pile origin seems more likely (although the low density could also be from ice).  the idea that its reddish colour could be due to accretion entirely from martian debris is tantalising (although small amounts of martian material of the surface has been suggested for some time).Jon <div class="Discussion_UserSignature"> Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars Arthur Clarke </div>

3488 · Oct 17, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>The rubble pile origin seems more likely (although the low density could also be from ice).  the idea that its reddish colour could be due to accretion entirely from martian debris is tantalising (although small amounts of martian material of the surface has been suggested for some time).Jon Posted by jonclarke</DIV>Hi Jon,Whilst I have no problem with debris from Mars being on the surface of Phobos, in fact I would expect that, I'm not so sure of Phobos being made of Martian debris.Phobos & Deimos, both to me anyway, scream at being captured asteroids from at least the outer part of the Asteroid Belt, where many type C & D reside (there are far fewer within the inner part of the Asteroid Belt though some such as 253 Mathilde have perihelia within the inner part of the belt).Both Phobos & Deimos appear to be more like the outer members of the Asteroid Belt & even some of Jupiter's far flung moons such as Carme, Sinope & Pasiphae. I think Phobos & Deimos share a common origin with these. Chances are. I'm wrong, but with information to hand, that's my best bet. I really hope a future Jupiter system mission or at least a Jupiter slingshot encounter, will pass one of Jupiter's outermost retrograding moons closely & then we can compare with Phobos & / or Deimos.We'll see. A couple of MEX images I have worked on.Phobos Stickney end. <img src="http://sitelife.space.com/ver1.0/Content/images/store/0/5/e0688079-898f-4345-a534-21fe4e4b2494.Medium.jpg" alt="" /> Phobos long rille. <img src="http://sitelife.space.com/ver1.0/Content/images/store/1/8/112fe3eb-5649-46aa-9876-e8690b1db584.Medium.jpg" alt="" /> Andrew Brown.  <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

Search

closing in on the origin of Marsâ€™ larger moon

JonClarke

Guest

3488

Guest

JonClarke

Guest

silylene old

Guest

JonClarke

Guest

3488

Guest

Similar threads

TRENDING THREADS

Latest posts

Share this page