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- Newsgroups: alt.folklore.urban
- Path: sparky!uunet!usc!wupost!sdd.hp.com!hp-cv!hp-pcd!hpcvaac!billn
- From: billn@hpcvaac.cv.hp.com (bill nelson)
- Subject: Re: asteroids beyond Jupiter
- Message-ID: <1992Dec24.192807.29315@hpcvaac.cv.hp.com>
- Organization: Hewlett-Packard Company, Corvallis, Oregon USA
- References: <Bzqq5n.8BF@polaris.async.vt.edu>
- Date: Thu, 24 Dec 1992 19:28:07 GMT
- Lines: 47
-
- jfurr@polaris.async.vt.edu (J. Furr) writes:
- : >: >
- : >Guess I will have to do some study of the recent research. Do you have some
- : >cites to simplify my astronomical task?
- :
- : Well, yes. I've been trying to get into a library to get actual books to
- : cite from, but they're all closed here at Va. Tech for the holiday. You
- : claim that all true asteroids orbit between Mars and Jupiter. Then, I ask
- : you, what about the asteroids that show up in the papers zooming past
- : Earth every so often? Every year or so they tell us that another one came
-
- No - I never did make such a claim. My definition of asteroid is: any object
- that originated in the asteroid belt. I claim that such an object could not
- be captured by a planet - without undergoing a serious kinetic energy loss
- somewhere.
-
- : within a million miles. Furthermore, although the name of the asteroid
- : class escapes me while I'm unable to get at books, there is a whole class
- : of asteroids that spends most of their time out around Saturn and beyond,
- : in highly elliptical orbits that infrequently bring them in nearer the
- : Sun.
-
- Ok, you now have asteroids that have been perturbed out to around the
- orbit of Saturn. Keep going, you have got 1/3rd the way to Neptune.
-
- : Saturn and Jupiter now have so many moons verified as orbiting them
- : that it's not big news anymore. Each has ten or so tiny rocks that used
- : to be asteroids orbiting way out. From what I recall reading in astronomy
-
- Do you have some documentation for this? I suppose, for Jupiter and Saturn,
- it might be possible to capture an asteroid - since they have enough moons
- to possibly cause enough energy loss. However, I am still cynical.
-
- : books, some of these will orbit their gas giant for a few million years
- : and then escape again.
-
- Where are they going to get the energy to do so?
-
- : Pluto's "moon", however, doesn't strike me as a
- : likely asteroid capture because Pluto just wouldn't have the gravitational
- : pull to snag something nearly as large as itself and keep it there.
-
- That is not the major problem - the problem is: where would sufficient
- energy be shed - the same is true for the supposition that Pluto was
- captured by Neptune.
-
- Bill
-