[meteorite-list] Fw: [Geology2] Meteorite fragments discovered 20 years after bolide event in Czech Republic

From: Anne Black <*impactika_at_meteoritecentral.com*> Date: Wed, 15 Oct 2014 20:33:37 -0400 Message-ID: <8D1B6EFF5ADDE93-730-2E502_at_webmail-m263.sysops.aol.com> · impactika_at_meteoritecentral.com

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On 10/15/14, Anne Black via Meteorite-list
<meteorite-list at meteoritecentral.com> wrote:
> You could also compare them to Holbrooks, still found 100+ years after
> the fall.
> And No, they don't look right.
> Not buying either.
>
>
> Anne M. Black
> www.IMPACTIKA.com
> IMPACTIKA at aol.com
>
>
> -----Original Message-----
>  From: Michael Farmer via Meteorite-list
> <meteorite-list at meteoritecentral.com>
> To: MEM <mstreman53 at yahoo.com>
> Cc: Meteorite Mailing List <meteorite-list at meteoritecentral.com>
> Sent: Wed, Oct 15, 2014 5:55 pm
> Subject: Re: [meteorite-list] Fw: [Geology2] Meteorite fragments
> discovered 20 years after bolide event in Czech Republic
>
>
> Sorry but fake as crap, clearly ancient NWA meteorite. Pultusk stones
> are still
> being 150 years after the fall and they don't even look hardly 
weathers
> at all,
> same wet climate.
> Sorry but I call a scam,
> Michael Farmer
>
> Sent from my iPad
>
>> On Oct 15, 2014, at 4:53 PM, MEM via Meteorite-list
> <meteorite-list at meteoritecentral.com>
> wrote:
>>
>>
>> <www.sciencedaily.com/releases/2014/10/141014142736.htm>
>>
>> Meteorite fragments discovered 20 years after bolide event in Czech
> Republic
>> Date: October 14, 2014
>> Source: Astronomy & Astrophysics
>> Summary: Scientists have discovered meteorite fragments 20 years
> after the
> corresponding bolide
>> was seen in the skies of the Czech Republic. This discovery was made
> possible
> by reanalyzing the trajectory, which moved the impact line by 330
> meters.
> Interestingly, the meteorites found on the ground are of
>> different types, pointing to a parent asteroid of heterogeneous
> composition.
>>
>>
>>
>> ________________________________
>>
>>
>> First three Bene?ov meteorites found in April 2011, with metal
> detectors. From
> left to
>> right: H5 chondrite of 1.56 g, LL3.5 chondrite of 7.72 g with
> achondrite
> clast, and LL3.5 chondrite of 1.99 g [2].
>> Credit: Image courtesy of Astronomy & Astrophysics
>>
>>
>> Astronomy & Astrophysics is publishing the spectacular discovery of
> meteorite
> fragments 20 years after the corresponding bolide was seen in the 
skies
> of the
> Czech
>> Republic. This discovery was made possible by reanalyzing the
>> trajectory, which moved the impact line by 330 meters. Interestingly,
>> the meteorites found on the ground are of different types, pointing
> to a
> parent asteroid of heterogeneous composition.
>> Collisions of meter-sized meteoroids with Earth's atmosphere are
>> relatively rare, occurring about 40 times a year. They cause very
>> spectacular events, known as superbolides. One of the best known such
>> events, the Bene?ov bolide, occurred on 7 May 1991 at 23h 03m 46s UT
>> over the Czech Republic. It was recorded during systematic
> photographic
>> observations by the European Fireball Network and certainly ended in
> a
>> multiple meteorite fall, but no meteorite was found in the weeks and
>> years after the fall, despite many attempts.
>> In February 2011, nearly 20 years after the event, P. Spurn? and his
>> colleagues [1] measured the records again and analyzed the data with
>> improved methods. This led to a new picture of the whole event with a
>> revised atmospheric trajectory and a new impact location. This
> allowed
>> the team to recover the Bene?ov meteorites, 20 years after the fall,
>> exactly in the newly predicted area. It is the first time a meteorite
> is found
> so long after the bolide observation.
>> The team found four small, highly-weathered meteorites with a total
>> mass of 12 g. The probability that these four fragments come from
>> different meteoroids and were found by chance at the same place is
>> estimated to be 1 in 100,000 or less. Even more interestingly, these
>> four meteorites are of three different mineralogical types. This
> means
>> that the Bene?ov meteoroid was heterogeneous and contained at least
>> three different types of material. After the Almahata Sitta fall,
> this
>> is the second time that such a heterogeneous composition has been
> found. It
> raises the possibility that a significant fraction of all asteroids
>> are heterogeneous and that they were strongly reprocessed by
> collisions
>> with other asteroids in the main belt.
>> ________________________________
>>
>> Story Source:
>> The above story is based on materials provided by Astronomy &
> Astrophysics.
> Note: Materials may be edited for content and length.
>> ________________________________
>>
>> Journal Reference:
>>    1. Pavel Spurn?, Jakub Haloda, Ji?? Borovi?ka, Luk?? Shrben?,
> Patricie
> Halodov?. Reanalysis of the Bene?ov bolide and recovery of polymict
> breccia
> meteorites ? old mystery solved after 20 years. Astronomy &
> Astrophysics, 2014;
> 570: A39 DOI: 10.1051/0004-6361/201424308
>> ________________________________
>>
>>
>> Astronomy & Astrophysics. "Meteorite fragments discovered 20 years
> after
>> bolide event in Czech Republic." ScienceDaily. ScienceDaily, 14
> October
>> 2014. <www.sciencedaily.com/releases/2014/10/141014142736.htm>.
>>
>>
>>
>> .
>>
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