Re: Like Rover, Like Asteroid

From: Qystein?= Olsen (spam.me.senseless_at_sitting.duck)
Date: 10/21/04 

Date: Thu, 21 Oct 2004 14:03:50 +0200

Hop David skrev:

>
> 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.
>

This is due to secular resonances with Jupiter (and Saturn). A secular
resonance happens when the drifts in the longitude of periapse or the
ascending node of the asteroids are close to (or a ratio of ) an
eigenfrequency of the perturbing bodies. These and a few other types
resonances might destabilize the mean motion resonances. Kirkwood gaps
seems to appear where different types of resonances overlap. 

-- 
Øystein Olsen, oystein.olsen_at_astro.uio.no, http://folk.uio.no/oeysteio
Institute of Theoretical Astrophysics, http://www.astro.uio.no
University of Oslo, Norway