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Re: R: (meteorobs) WM1 shower?




----- Original Message -----
From: "Cooke, Bill" <Bill.Cooke@msfc.nasadot gov>
Sent: Monday, December 10, 2001 4:33 PM

> Comet WM1 is a long period comet, and meteor showers are only produced
> by short period comets.

I am sorry, but this is incorrect. The Aurigids on September 1 (both an
annual stream and producing outbursts) are due to a long period comet,
C/Kiess. And the alpha Monocerotids in November with big outbursts in 1925,
1935, 1985 and 1995 are due to a long period comet, see our paper in the
Astrophysical Journal (Jenniskens P., Betlem H., De Lignie M. and Langbroek
M.: The detection of a dust trail in the orbit of an Earth-threatening
long-period comet. The Astrophysical Journal 479 (1997), 441-447).

For the rest of course you are right: only an encounter with 'old' dust
would be possible, not with dust from the current perihelion passage.

Marco Langbroek (DMS)


---
Marco Langbroek                    private: marco.langbroek@wanadoodot nl
Leiden University                     work: m.langbroek@arch.leidenunivdot nl
Faculty of Archaeology
P.O. Box 9515
http://home.wanadoodot nl/marco.langbroek/
NL-2300 RA Leiden
The Netherlands
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