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A Shocker About Hyperion
Guest_BruceMoomaw_*
post Jul 11 2005, 11:15 PM
Post #1





Guests
We now have the first density estimate of it from Cassini -- and it appears
that we have yet ANOTHER icy rubble pile. The estimate: 0.6 grams/cc.
Also, the surface is now officially recognized as very weird, in a way that
suggests that it is in no way a solid world:
http://ciclops.org/view.php?id=1192
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Guest_BruceMoomaw_*
post Jul 12 2005, 02:07 AM
Post #2





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At any rate, now we know: Hyperion's non-spherical shape comes not from (as so many of us assumed) the fact that it's a solid moon that has had big chunks knocked off it by impacts, but from the fact that the whole moon is a
loosely bound and tidally distorted clump of small debris like Saturn's
innermost moons. Obvious question: where did the debris that accreted to
make Hyperion come from? Is it the finely shattered remnants of a single
solid moon that was originally near that orbit? Or have complex gravitational
interactions (mostly from Titan) caused debris from elsewhere in the Saturn
system to accumulate in a 3:4 resonance orbit with Titan and re-accrete
there into a rubble-pile moon?
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Posts in this topic
- BruceMoomaw   A Shocker About Hyperion   Jul 11 2005, 11:15 PM
- - alan   Obviously Hoagland is calling the wrong moon an al...   Jul 11 2005, 11:33 PM
|- - Decepticon   QUOTE (alan @ Jul 11 2005, 07:33 PM)Obviously...   Jul 12 2005, 12:09 AM
- - BruceMoomaw   Actually, those strange, small, relatively uniform...   Jul 12 2005, 02:03 AM
- - BruceMoomaw   At any rate, now we know: Hyperion's non-spher...   Jul 12 2005, 02:07 AM
|- - abalone   QUOTE (BruceMoomaw @ Jul 12 2005, 01:07 PM)Ob...   Jul 12 2005, 12:27 PM
- - Decepticon   Ok here's one that might be hard to swallow. ...   Jul 12 2005, 01:45 PM
- - Myran   QUOTE Decepticon wrote: Ok here's one that mig...   Jul 12 2005, 02:40 PM
- - Bob Shaw   If we're accepting *any* captures as the origi...   Jul 12 2005, 08:30 PM
- - abalone   QUOTE (Bob Shaw @ Jul 13 2005, 07:30 AM)If we...   Jul 12 2005, 11:18 PM
- - Bob Shaw   QUOTE (abalone @ Jul 13 2005, 12:18 AM)Captur...   Jul 13 2005, 02:09 PM
- - Rob Pinnegar   What about disintegrative capture? If, several bil...   Jul 14 2005, 12:10 AM
- - Bob Shaw   Rob: Seems reasonable - and presumably would also...   Jul 14 2005, 09:55 AM

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