[meteorite-list] Meteor shower meteorite dropping events

From: Meteorites USA <eric_at_meteoritecentral.com>
Date: Wed, 11 Aug 2010 22:45:50 -0700
Message-ID: <4C638A8E.1010604_at_meteoritesusa.com>

Thanks for the links Jason!

Eric



On 8/11/2010 10:18 PM, Jason Utas wrote:
> Hello Chris, Eric,
> The simple answer is no. No meteorites have ever been found that
> match all criteria for what we believe cometary material should look
> like.
>
> http://www.lpi.usra.edu/meetings/LPSC98/pdf/1004.pdf
>
> This is also the sort of topic that has been brought up again and
> again on the list. While I couldn't find any direct references for
> some reason, I was able to turn these up:
>
> http://www.mail-archive.com/meteorite-list at meteoritecentral.com/msg84604.html
>
> http://six.pairlist.net/pipermail/meteorite-list/2004-May/000683.html
>
> To condense: a few meteorites, namely the CI's, come close to what we
> think cometary material might look like. But those meteorites weren't
> associated with any known meteor showers, and are likely just
> fragments of D-class asteroids, which may or may not be remnants of
> "burned-out" comets (comets that got trapped in the inner solar system
> and stripped of most of their volatiles).
> But, based on the above paper, even the CI's are probably not actual
> "cometary" material, though they fit the bill better than most other
> meteorites, for sure.
>
> Suggesting that an iron meteorite like Mazapil might be associated
> with a comet is nigh on preposterous - comets aren't made of iron, and
> shouldn't have anything to do with such a meteorite. Comets are
> undifferentiated bodies that have generally remained icy since their
> formation over four and a half billion years ago. A two or three
> billion year old iron with a thompson structure that took the better
> part of a billion years to form simply could not be from a comet.
>
> http://adsabs.harvard.edu/abs/2002M%26PS...37..649B
>
> Some more basic reading:
>
> http://www.amsmeteors.org/faqm.html#11
>
> Scroll to section before bottom: "Meteorites from Comets?"
>
> http://www.pibburns.com/catastro/meteors.htm
>
> Best,
> Jason
>
>
> On Wed, Aug 11, 2010 at 9:34 PM, Meteorites USA<eric at meteoritesusa.com> wrote:
>
>> Thanks for posting this Chris... This sounds like a good topic for an
>> article for my magazine. If you're interested in it, and/or would like to
>> write for the mag on this topic let me know. Anyone have a working theory
>> based on evidence of this associative phenomena? I've heard many people
>> suggest that meteor showers don't drop meteorites. Then I've heard people
>> associate meteorite falls that happen during meteor showers with said
>> shower. And I've also heard that people believe that there is ZERO
>> connection and it's purely coincidence.
>>
>> So which is it? yay or nay, or maybe? or no one really knows...?
>>
>> Eric
>>
>>
>>
>> On 8/11/2010 8:59 PM, Chris Spratt wrote:
>>
>>> I know of one meteor shower (November Andromedids) where an iron meteorite
>>> fell in Mazapil, Mexico during the shower.
>>>
>>> Are there any similar events?
>>>
>>> Chris Spratt
>>> Victoria, BC
>>> (Via my iPhone)
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>
Received on Thu 12 Aug 2010 01:45:50 AM PDT