[meteorite-list] NEO orbits

[Matson, Robert D.]

Hi Graham,

Keep in mind that asteroid orbits are dynamic, and that most of
the Apollos, Amors and Atens of today once had their aphelia
between Mars and Jupiter. Planetary perturbations and resonances
over the millenia caused those orbits to evolve into earth-crossing
(or in the case of Amors, earth-approaching) orbits.

--Rob

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Graham
Ensor
Sent: Monday, February 25, 2013 11:05 AM
To: Michael Mulgrew
Cc: Meteorite list
Subject: Re: [meteorite-list] NEO types

But the diagram does not show the Aten group's orbit intersecting the
asteroid belt?.....

Graham