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Re: Mars again
STEVEN R. SCHONER schrieb:
> If my memory serves me, did not more than two of these fall
> in the month of October, at the beginning of the month?
Hi Steve and List,
Chassigny fell 1815, October 3, 08:00 hrs
Nakhla fell 1911, June 28, 09:00 hrs
Shergotty fell 1865, August 25, 09:00 hrs
Zagami fell 1962, October 3, -- hrs
> Anyway, it seems that one of these things
> falls to be recovered every 30 to 40 years.
The time span looks more like 50 years:
1865-1815 = 50
1911-1865 = 46
1962-1911 = 51
Interestingly, all of them fell in the early morning hours. Hmmm!
References worth studying:
T.D. Swindle et al. (1996) Are there meteorite streams? - Investigations
of a possible basaltic achondrite stream (abs. Meteoritics 31, 1996,
A136).
WOLF S.F. (1993) Trace element study of H chondrites: Evidence for
meteoroid streams (Ph.D. Dissertation, Purdue Univ. 217 pp.).
R.T.Dodd et al. (1993) An H-chondrite stream: Identification and
confirmation (JGR 98, 15, 105-115, 118).
DODD R.T. (1992) H and L chondrite clusters and streams (Meteoritics
27-3, 1992, A214).
S.F.Wolf et al. (1995) A second H-chondrite stream of falls (abs.
Meteoritics 30, 601).
COOK A.F. (1973) A working list of meteor streams (In Evolutionary and
Physical Properties of Meteoroids, eds. C.L. Hemenway et al., pp.
183-191, NASA SP-319, Washington, D.C.).
HALLIDAY I. (1987) Detection of a meteorite ‘stream’: Observations of a
second meteorite fall from the orbit of the Innisfree chondrite (Icarus
69, 550-556).
Best wishes,
Bernd
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