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, [email protected] 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, [email protected]
http://astroday.net
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