[meteorite-list] Re: The Pribram/Neuschwanstein Meteoroid Stream Is Not Dead

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Thu Apr 22 10:08:32 2004
Message-ID: <20020927211311.30910.qmail_at_web11601.mail.yahoo.com>

Hi Herb -

I probably should have expressed this a different way.


It's the time BEFORE the LPBE, the sizes of the parent
bodies, and the mechanisms of their formation and
differentiation.

thanks much anyway, and all the best,
ep


--- Herbert Raab <herbert.raab_at_utanet.at> wrote:
>
> E.P. Grondine writes:
> > I suppose that ultimately this may all go back to
> > whether or not Jupiter occupied its current orbit
> > before the LPBE (Late Period Bombarment Event) -
> my
> > guess is that it did not.
>
> As far as I can say, the location of Jupiter's orbit
> during
> the Late Heavy Bombardment (if it has changed at
> all) has no
> influence on the meteorid streams we see today.
> Meteorid
> streams "live" for a few Ma beore they are disrupted
> by
> perturbations from the planets, whilst the Late
> Heavy
> Bombardment ended ~3.8 Ga ago. If a
> Pribram/Neuschwanstein
> Meteoroid Stream really exists, then it probably
> traces back
> to a much younger event.
>
> There are some great simulations of colliding rubble
> pile
> asteroids at this web site:
>
> http://www.astro.umd.edu/~dcr/Research/rubble.html
>
> When looking at these animations, just think of one
> rubble pile
> asteroid made of H-type material, and of the other
> made of
> E-chondrites: At the end, you get a new rubble pile,
> where H-
> and E-type material is mixed, plus a number of H-
> and E-type
> fragments that escape. These fragemnts will probaly
> share similar
> orbits - in other words, the form an meteorid stream
> that includes
> both H and E-type material.
>
> Enjoy the animations... ;^)
>
> Greetings,
> Herbert
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
>
http://www.pairlist.net/mailman/listinfo/meteorite-list


__________________________________________________
Do you Yahoo!?
New DSL Internet Access from SBC & Yahoo!
http://sbc.yahoo.com
Received on Fri 27 Sep 2002 05:13:11 PM PDT