[meteorite-list] Russian meteor composition

[Dennis Miller]

The Science Channel is airing a special on the Russian meteorite event, tonight  at 8:00PM.
Dennis

Sent from my iPhone

On Feb 16, 2013, at 2:51 PM, "Galactic Stone & Ironworks" <meteoritemike at gmail.com> wrote:

> Hi Rob and List,
> 
> Good points, and some of those same thoughts had crossed my mind.
> Namely, where are the meteorites?  If this had been a Sikhote Alin
> type of fall, we would have seen many meteorites recovered by now.
> Bogus eBay-offerings aside, nothing has been recovered yet - or, if
> any recoveries have been made, they have not been publicly announced.
> 
> Is there spectral data on this object?  And if so, can someone provide a link?
> 
> Best regards,
> 
> MikeG
> 
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> 
> On 2/16/13, Rob Matson <mojave_meteorites at cox.net> wrote:
>> Hi All,
>> 
>> Getting back to the Russian meteor itself, what I find most surprising so
>> far is
>> that after two full days of daylight hours to search for fragments against
>> a
>> fairly white background, not one meteorite has been found. The prevailing
>> wisdom ~had~ been that this was an iron, given the deep penetration and
>> seemingly minimal deceleration. But with nothing found so far -- in spite
>> of
>> the relatively low entry velocity, shallow trajectory, and huge initial mass
>> --
>> I begin to question that initial compositional assumption. Maybe this was
>> closer to Tunguska-like than it was Sikhote-Alin-like (i.e. cometary). That
>> said, the initial estimate of the orbit doesn't appear to be very
>> comet-like
>> (low semi-major axis). The period is lower than that of even 2P/Encke.
>> 
>> --Rob
>> 
>> 
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