Rosetta flyby of Asteroid Lutetia |
Rosetta flyby of Asteroid Lutetia |
Dec 26 2009, 07:35 PM
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#101
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
time to start a thread on one of the most interesting UMSF events of 2010...
Published thu on arXiv Ultraviolet and visible photometry of asteroid (21) Lutetia using the Hubble Space Telescope |
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Jul 11 2010, 04:05 PM
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#102
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
Lutetia's grooves certainly make it more likely that such features have an origin that does not rely on interactions with a planet, either from ring impacts or debris from large impacts on the surface of the planet. That's not to say they rule it out completely but I'm a lot less convinced about them now that we have evidence of very similar features on a body that almost certainly has never been near a planet. Shock effects from impacts, or (far less likely I think) tidal effects from passing near other bodies, seems much more likely now. The similarity with Phobos is quite spooky too.
I'm sure there will be many other interesting findings from this flyby but it's fantastic to see data come back immediately that should help develop better ideas about a really intriguing structural feature on small bodies that seems to be common and not understood. |
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