[meteorite-list] How far away can a meteor be heard?

From: Gary Fujihara <fujmon_at_meteoritecentral.com>
Date: Thu, 09 Jul 2009 06:55:08 -1000
Message-ID: <5641BCCF-DE4E-4E51-A0C1-1452EA927371_at_mac.com>

Aloha Bernd,

Thank you for the data on Peekskill. If memory serves me correctly
Peekskill exhibited an extended luminous phase due in part to a
shallower entry angle into the earth's atmosphere. This PA fireball,
from video footage, appears to fall at a steeper angle and therefore
should cover a shorter groundpath. Best of luck to all in the field,
and happy hunting!

gary

On Jul 9, 2009, at 6:27 AM, bernd.pauli at paulinet.de wrote:

> All you (hopefully: lucky) hunters might also have to factor this
> into your
> calculations and hunting preparations:
>
> During its luminous phase which lasted over 40 seconds, the
> Peekskill meteoroid
> covered a ground path of some 700 to 800 km according to Brown et
> al. (1994).
>
> Aerodynamic drag caused a greater than 20 km longitudinal
> displacement of the
> fragments and the transverse displacement was about 1km for some of
> the
> smaller fragments.
>
>
> Video Observations of the Peekskill Meteorite Fireball: Atmospheric
> Trajectory and Orbit (Meteoritics 29-4, 1994, p. 455):
>
> 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, New York,
> with a vertical velocity of about 80 m/s.
>
> Good luck!
>
> Bernd
>
>
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Gary Fujihara
AstroDay Institute
105 Puhili Place, Hilo, HI 96720
(808) 640-9161, fujmon at mac.com
http://astroday.net
Received on Thu 09 Jul 2009 12:55:08 PM PDT