On a ring origin of the equatorial ridge of Iapetus |
On a ring origin of the equatorial ridge of Iapetus |
Guest_AlexBlackwell_* |
Aug 29 2006, 06:18 PM
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Guests |
Wing Ip just had an interesting Iapetus-related paper published in GRL.
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Sep 8 2006, 02:54 PM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Is this the one? http://photojournal.jpl.nasa.gov/jpegMod/PIA07778_modest.jpg
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Sep 8 2006, 03:04 PM
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Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
Iapetus is undeniably oblate, but the question is is it enough. I suspect another factor determining how fast and efficient the flattening of the rings would be is the orbital period and speed. I calculate an exactly 3 hour orbital period for the lowest possible orbit. Is the tendency to flatten the rings greater than the tendency to disperse them by various factors, such as Saturn perturbations and light pressure effects, etc. That seems to be the principal question.
Tasp, try this. -------------------- |
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Sep 9 2006, 05:31 AM
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#4
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Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
Iapetus is undeniably oblate, but the question is is it enough. I suspect another factor determining how fast and efficient the flattening of the rings would be is the orbital period and speed. I calculate an exactly 3 hour orbital period for the lowest possible orbit. Is the tendency to flatten the rings greater than the tendency to disperse them by various factors, such as Saturn perturbations and light pressure effects, etc. That seems to be the principal question. Tasp, try this. Thanx, that's it! Much appreciated. |
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