[meteorite-list] Bolides and Peekskill

[Pete Pete]

Thank you, all, for your expertise.
It makes my cantelope-sized meteorite with some black fusion crust all the 
more awe-inspiring!

Still speaking of bolides, here's a decent pic I came across that one can 
use as wallpaper:

http://www.dragon-vds.com/2d_meteorites.php

http://www.dragon-vds.com/2d_meteorites.php

Cheers,
Pete


From: bernd.pauli at paulinet.de
To: Meteorite-list at meteoritecentral.com
Subject: [meteorite-list] Bolides and Peekskill
Date: 17 Jan 2006 17:58:03 UT

Pete asked:

If this is a worthwhile question, how about Peekskill, which so many of us
witnessed - how large would that have been at the start of its descent?

Chris wrote:

Peekskill...an initial mass of about 10 tons, so...an almost 2 meter 
diameter.

Hello List,

Graf et al. (1994) Size and exposure history of the Peekskill meteoroid
(Meteoritics 29-4, 1994, A469): Both values (= measured 26Al activities)
are consistent with a preatmospheric radius of ~50 cm.

Ceplecha Z. et al. (1994) Video observations of the Peekskill H6 meteorite
fireball - Atmospheric trajectory and orbit (Meteoritics 29-4, 1994, A455):

a) ...an initial mass of the order of 10^­4 kg and with initial velocity of 
14.7 km/s

b) The dark flight of the recovered meteorite started from a height of 30 
km, when
    the velocity dropped below 3 km/s, and the body continued an additional 
horizontal
    distance of 50 km without ablation, until it hit a parked car in 
Peekskill, NY, with
    a vertical velocity of about 80 m/s.

Graf et al. (1997) Exposure history of the Peekskill (H6) meteorite
(Meteoritics 32-1, 1997, 25-30):

[We] conclude that Peekskill's radius was less than 70 cm when it entered 
the Earth's
atmosphere. This size limit is somewhat smaller than the photometric 
determinations
(Brown et al., 1994).


Best wishes,

Bernd

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