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- From: bjacobs@chopin.udel.edu (William J Jacobs)
- Subject: Re: asteroids beyond Jupiter
- Message-ID: <BzuECq.8LD@news.udel.edu>
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- Organization: University of Delaware
- References: <BzqqpJ.8Eu@polaris.async.vt.edu> <1992Dec24.193342.29953@hpcvaac.cv.hp.com>
- Date: Sat, 26 Dec 1992 01:19:38 GMT
- Lines: 38
-
- In article <1992Dec24.193342.29953@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
- >jfurr@polaris.async.vt.edu (J. Furr) writes:
- >:
- >: I post this whole mess to sci.space and say "help" because it seems that
- >: one side in a.f.u. is arguing as follows: _all_ asteroids occur between
- >: the orbits of Mars and Jupiter. Therefore Neptune, Pluto, etc. could not
- >: possibly have captured asteroids because asteroids don't go out that far.
- >
- >Not quite. My definition of asteriod is: any body that orginated in the
- >"asteriod belt" (between Mars and Jupiter). I have made no claim as to
- >where they can orbit. Jupiter is large enough to cause significant perturbation
- >to their orbits.
- >
- >However, it is a long way from Jupiter to Neptune. I am waiting for someone
- >to post a reference that states that there are asteriods (by my definition)
- >that orbit that far out.
- >
- >Bill
-
- O.K., here's a reference for you. From "A photometric study of (2060) Chiron
- and its coma" by R.M. West published in Astronomy and Astrophysics vol. 241
- pg. 635. R. M. West says, "(Chiron) is the most distant minor planet known
- at present; the orbital eccentricity is moderately high (e=0.38) and with a
- semi-major axis of 13.7 AU, the peri- and aphelia of (2060) Chiron are near
- the mean orbital distances of Saturn and Uranus, respectively."
-
- So, as of July 6, 1991, the answer to your question is "no, there aren't
- any asteroids that far out". That really isn't conclusive as we really don't
- have the right technology at present to look for them. We need a larger
- Infrared telescope, or maybe a Hubble that isn't all bollixed up. It seems
- to me that there are some asteroids from the belt out there, probably about
- the same amount that are found amongst the inner planets (which means not
- very many), in a great deal more volume.
-
- Bill Jacobs
- Astronomer at large
-
-
-