[meteorite-list] Russian meteor composition

From: Galactic Stone & Ironworks <meteoritemike_at_meteoritecentral.com>
Date: Sat, 16 Feb 2013 16:51:41 -0500
Message-ID: <CAKBPJW9Z8Q0J6fmEW2nTjEu3m04UhGh6eyR4PvFjNKJe=w5Vrw_at_mail.gmail.com>

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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Received on Sat 16 Feb 2013 04:51:41 PM PST