(meteorobs) Query re: MARTIAN METEORITES

Robert is not a current 'meteorobs' subscriber. If you follow up, please be
sure to MANUALLY put 'cyborg3k@flashdot net' in the "Cc:" line of your reply!

[PS: BTW, Robert, this question is slightly off-topic here, as our focus is
on meteors (flashes of light from cometary debris) rather than meteorites.
But you may perhaps be contacted by some of us with an interest in ALH 84001.]

Clear skies,
Lew Gramer <owner-meteorobs@jovian.com>

------- Forwarded Message

Date: Tue, 02 May 2000 21:49:25 -0500
From: "Robert W. Johnson" <cyborg3k@flashdot net>
To: dedalus@latrade.com


My name is Robert Johnson. I have been checking out your site and
several others, trying to get a little background for an article I may
write about Martian meteorites. During this, a couple of questions came
to mind, and I was wondering if I might enlist your help in clearing
them up.

1] While the evidence of  specific isotopes of atmospheric gases trapped
in the rocks looks pretty compelling , it is the only evidence I have
  so far that's not circumstantial. Would the presence of such gases
  out the possibility of a different origin, perhaps that
of a comet, or the rings of one of the outer planets?

2]  Has anyone ever been able to calculate the rate at which a meteoroid
is consumed upon entering the atmosphere? Knowing the mass of what
remains of ALH 84001, is it possible to estimate its original size?

Any help you could give would be greatly appreciated.

Thanks, RWJ

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