Re: Like Rover, Like Asteroid
From: Hop David (hopspageHATESSPAaMmM_at_tabletoptelephone.com)
Date: 10/21/04
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Date: Wed, 20 Oct 2004 23:57:32 -0700
Ron wrote:
> Both asteroids take 7.9 years to complete one orbit around the sun
> between Mars and the mammoth gaseous planet Jupiter. Neither follows a
> path that crosses the orbit of other planets and neither will be
> knocked
> out of orbit by the immense gravitational force of Jupiter. They
> belong
> to a small group of asteroids known as the Hilda group that have a 3:2
> orbital resonance with Jupiter. This means that each time Jupiter
> completes two orbits around the sun, the asteroids complete three.
The above seems to imply a stable orbit _because_ of Jupiter resonance.
ISTR that Pluto also enjoys a stable orbit due to its resonance with
Neptune.
But I thought many main belt asteroids were knocked out of the Kirkwood
gaps _because_ of Jupiter resonance.
It appears that resonance can be both stabilizing and destabilizing.
This perplexes me.
-- Hop David http://clowder.net/hop/index.html
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