[meteorite-list] Meteoroid streams: RESEND

From: Matson, Robert D. <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Mon, 16 Nov 2009 10:31:41 -0800
Message-ID: <7C640E28081AEE4B952F008D1E913F17021BD2DC_at_0461-its-exmb04.us.saic.com>

Has not appeared after 21 hours so resending... --Rob

-----Original Message-----
From: Matson, Robert D.
Sent: Sunday, November 15, 2009 1:40 PM
To: meteorite-list at meteoritecentral.com
Subject: Meteoroid streams

Hi All,

Each time a pair of falls occurs at roughly the same geographic
location on approximately the same calendar date (in different
years), I suppose it is only human nature to try to assign some
cause to the synchronicity. But fall location duplication can
be quickly dismissed as random chance, since there is no
connection between earth-crossing asteroid orbital periods
and earth's rotational period.

However, date-synchronized falls ~is~ a possibility. Dr. Rubin
and I wrote a paper on this subject which appeared in the
journal _Earth, Moon and Planets_ in April 2008:

<http://www.springerlink.com/content/fh155p1n30318876/?p=c33955927db24de
2b0c2116738abeb6d&pi=0>

Our conclusion was that due to the tiny fraction of meteorite
falls that are successfully recovered each year, and the
comparatively short dynamical lifetime of a meteoroid stream
(10^4 to 10^5 a), the probability of successful recovery of two
falls from the same stream are extremely small.

--Rob

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com on behalf of
mafer at imagineopals.com
Sent: Sun 11/15/2009 12:20 PM
To: meteorite-list at meteoritecentral.com
Subject: Re: [meteorite-list] new fall RICH friday 13 / 11/2009; ;
21.25 cmt
 
could there be a "cloud" of objects that Earth's orbit flys through?

On November 15, 5:33 pm michael cottingham <mikewren at gilanet.com> wrote:
> That is Great News!!!! Go Get em!
>
> Michael Cottingham
> On Nov 15, 2009, at 10:22 AM, habibi abdelaziz wrote:
>
> > hi guys
> > each time of this year october and november we have a fall,
> > it look it's a cyclique falls with the rotation of earth in a
> > precise time and space with a small incertitude of a month,
> >
> > it fells over rich 20 km north est,
> >
> > ITS CONFIRMED ? more news to fallow,
> >
> > thanks
> > aziz habibi
Received on Mon 16 Nov 2009 01:31:41 PM PST