[meteorite-list] Rubble pile asteroids

From: Robert Verish <bolidechaser_at_meteoritecentral.com>
Date: Thu Apr 22 10:08:31 2004
Message-ID: <20020925051755.14683.qmail_at_web80306.mail.yahoo.com>

“Rubble pile asteroids”!

Two rubble pile asteroids colliding to form a
meteoroid stream that includes material from BOTH
rubble pile asteroids!!

It wouldn’t be much of a stretch to suggest that some
of the larger meteoroids in that stream could be
rubble piles, as well.

Which would be a coincidence, because that is exactly
how I recently described the meteoroid that produced
the Gold Basin strewn field(s).
I have described it as being a loose rubble pile of
L6, L5, and L4 meteoroids; held together by the most
minimum of gravitational attraction. How else can you
explain a strewn field of stony meteorites with such a
variation in metamorphic grade, yet NO EVIDENCE of
brecciation, meaning that each individual stone is
either all L6, or all L5, or all L4, but never a
combination of the three?

This “rubble pile” theory begs for a new
classification scheme:
  
For example, Gold Basin = L4\L5\L6
otherwise, the old standby (L5, anomalous) would be a
suitable compromise.

Bob V.
  
cc: Nomenclature Committee

----------- Original Message ------------
[meteorite-list] Re: The Pribram/Neuschwanstein
Meteoroid Stream Is Not Dead
Herbert Raab herbert.raab_at_utanet.at
Tue, 24 Sep 2002 22:38:15 +0200

++++snip!++++

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 fragments will
probably share similar orbits - in other words, they
form an meteoroid stream that includes both H- and
E-type material.

Enjoy the animations... ;^)

Greetings,
  Herbert


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Received on Wed 25 Sep 2002 01:17:55 AM PDT