Any of this has to be taken in a very speculative sense as there are no
smoking guns or even luminous trail as was the case of Vesta.
The correction for weathering of the regolith is hokey when applied to
a case like this, and not one for which we have specimens already to
compare and make the adjustments already having the answer in the back
of the book to continuiously peek at.
In any case if the asteroid simply had a coat of paint, there is
nothing you could tell by looking at it with UV-Vis light, except that
it is painted - your eye could confirm this fact. The regolith can be
corrected when we are talking only a layer one ten-thousandth or so
thick, in which case you are essentially treating it as a thin section
using only reflected light.'
It will take a suite of instruments to do some better speculation,
which include precise measurements of gravitational and magnet
properties if possible, for example. But there's simply no substitute
for a specimen to tweak the science and publish the results fitted to
the reality instead of having the reality you speculate fitting to the
results ;-)
Kindest wishes
Doug
-----Original Message-----
From: almitt2 <[email protected]>
To: meteorite-list <[email protected]>
Sent: Sat, Nov 12, 2011 2:54 am
Subject: Re: [meteorite-list] Lutetia
Hi Larry and all,
Without knowing what research has been done studying Lutetia, if memory
serves me right, don't they take into account the regolith on the
surface of
an asteroid and adjust the spectra so it more closely matches "clean"
meteorite specimens that we have? Thought this may have not been done
yet
and why the discrepancy on the reflective composition on the asteroid is
low.
I figure that Larry would have a better bead on the subject than I but
wanted to add another log on the fire. Best!
--AL Mitterling
Quoting [email protected]:
Hi Michael:
The only thing that I would disagree with in the article has to do
with
where Lutetia formed. It has a fairly low inclination and low
eccentricity
(for a main belt asteroid), so I doubt there is any way that it
could have
formed in the inner part of the Solar System and found its way into
the
main belt. I think it formed there to begin with. Also, I think
that the
albedo of Lutetia is a little low compared to enstatite chondrites,
so
this might also be of concern when comparing Lutetia to enstatites.
Larry
Cool, now we know where all of our enstantite meteorites likely
come from.
Michael Farmer
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