(meteorobs) Green Fireballs
Ed Majden
epmajden at shaw.ca
Thu Jan 27 12:23:52 EST 2011
Hello Members:
I have been following this discussion about so called "Green
Fireballs". This is nothing unusual. Mg I in the green region of the
spectrum is a major contributer along with other lines in this
region. The eye is also very sensitive to the green region. I really
don;t think "green fireballs" are unusual as far as I know. Green can
be also strong if fast fireballs >40 km/sec and the contributer here
could be the forbidden line of Oxygen at 557.7 n.m. I have checked
with Bob Lunsford from the AMS and Dr. Jiri Borovicka, meteor
scientist, at Ondrejov. Both agree with my comments. Jiri's comment
is noted below.
Quote:
I share your view that green fireballs are nothing special.
There are some suspicions that fireballs reported by eyewitnesses to be
deeply green are not ordinary meteoric fireballs but a different
phenomenon, perhaps related to atmospheric electricity. I do not think
so. All fireballs we ever photographed were "normal".
Also see: Astron Astrophys. 279, 627-645 (1993), A Fireball Spectrum
Analysis by Jiri Borovicka
Best regards:
Ed Majden - Amateur Meteor Spectroscopist - Asteroid Majden 142368 -
RASC Chant Medal 2006
Courtenay, B.C. CANADA
http://members.shaw.ca/epmajden/
http://www.bcmeteors.net/
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