[meteorite-list] Preliminary MOSS meteorite classification

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Thu Aug 31 12:21:02 2006
Message-ID: <20060831155411.33597.qmail_at_web36901.mail.mud.yahoo.com>

Hi all -

A little blue sky here - I hope this makes sense -

Because of the difference in fragmentation of
asteroids and comets, any regular annual pattern of C
falls would argue for a cometary source. But even a
comet debris stream in an ellipse will have bulges in
it (years) when C meteorite recovery (and possibly C
meteors) should be best. (Is anoyne doing spectral
work on meteors?)

Meteorites with asteroid source have been assumed to
be random. But there may be two source debris streams
which are non-random: First, debris from the
disintegration of an asteroid which ended up on an
Earth insecting orbit and has either impacted or will
impact. Second, debris thrown out and sent Earthward
by impacts between asteroids.

But to even start analysis you'd need a substantial
number of observed falls - how many recovered falls
are there entire?

good hunting -
Ed

--- MexicoDoug <MexicoDoug_at_aim.com> wrote:

> Dr. Grossman wrote:
>
> >The odds may not be as astronomical as you
> >think. I estimate that the probability that 3
> >out of 6 random people were born in the same month
> is just over 10%.
>
> jeff
>
> Jeff, That's uncommonly good intuition. Reminds me
> of this discussion:
>
>
http://www.mail-archive.com/meteorite-list_at_meteoritecentral.com/msg37371.htm
> l
>
> ODDS of exactly three of six being in one month, and
> the other 3 in two or
> more other months not July:
> =12*COMBIN(6,3)*PERMUT(11,3)/12^6
> = 7.96% (with 90% confidence for me that it's
> right...)
>
> But if we look at two weeks' interval where the
> falls fit (12 or 13 days
> actually), instead of one month, it becomes,
> = 2.32%, though that's not entirely fair because we
> are manipulating the
> beginning and ending date a little to suit us so it
> has higher likelihood of
> spanning two intervals than picking the month.
> So I think the practical answer can be argued
> somewhere in between the two.
> Then again maybe not. These number pairings and
> triplettings are headaches.
> So mathematical scribblings are not warranted :-)
>
> 5% may be low probability, but, even Eva Longoria
> has to have a boyfriend.
> http://en.wikipedia.org/wiki/Tony_Parker
> Best wishes, Doug
>
> P.D. I used to think my birthday was more special
> because more Full Moons
> occurred on it than any other day of the year.
> Unfortunately for me, it was
> because I started measuring from my date of birth, a
> full Moon, and extended
> it to the present. So once I went a Full Moon
> earlier and redid the
> calculation. And no longer was my birthday #1...So
> much for picking
> intervals of convenience...
> P.D.D. I used to believe in doing statistics on
> fall dates (bugging Marco,
> etc.) until I realized - if there is no meteor
> shower accompanying the falls
> ... why on Earth would only big rocks be there and
> falling. Any collision
> is bound to make may many more particles of sand,
> especially for such a
> friable meteorite that has been described - and as
> Mike's narrative and
> photo illustrate the pulverization just where it
> smashed against a little
> cement at a snail's pace. 80 grams of powder makes
> many, many, little
> meteors. So until we have the July 12 radiant...I'm
> personally not a
> believer. (Is 5 km/sec [=11,200 mph] the average
> assumed collision speed in
> space)
>
> Alpha Cygnids Jul11-Jul30 peak=Jul 18 ZHR=2
> South Delta Aquarids Jul12-Aug19 peak=Jul 28 ZHR=20
>
>
> At 02:41 PM 8/30/2006, Michael Farmer wrote:
> >That is amazing though, how with only 6 witnessed
> falls in the last 200
> >years of CO3 meteorites, 50% of them are in July!
> Those are some
> >astronomical odds!
> >Mike Farmer
> >
> >-----Original Message-----
> >From: meteorite-list-bounces_at_meteoritecentral.com
>
>[mailto:meteorite-list-bounces_at_meteoritecentral.com]
> On Behalf Of Jeff
> >Grossman
> >Sent: Wednesday, August 30, 2006 11:35 AM
> >To: meteorite-list_at_meteoritecentral.com
> >Subject: Re: [meteorite-list] Preliminary MOSS
> meteorite classification
> >
> >Yes, I noticed that too. Could just be a
> >coincidence, however. The dates are almost 2 weeks
> apart.
> >
> >jeff
> >At 02:21 PM 8/30/2006, Bjorn Sorheim wrote:
> >
> >
> > >Michael Farmer wrote:
> > > >Hello everyone, well here is the preliminary
> > > >classification data on the MOSS Norway
> meteorite fall.
> > > >Dr Jeff Grossman is doing the classification
> and he
> > > >sent me the following information a little
> while ago.
> > >.....
> > >
> > > >Avg Fa PMD
> > > >Kainsaz (CO3.2) 11.8 70
> > > >Felix (CO3.3) 18.4 70
> > > >Ornans (CO3.4) 19.0 68
> > > >Lance (CO3.5) 21.2 63
> > > >Warrenton (CO3.7) 33.9 21
> > >
> > > >Moss 19.9 65
> > >
> > > >This puts Moss between Ornans and Lance,
> > >
> > >Yes, you are so right Dr Grossman! Just look
> here:
> > >
> > >Ornans , Fall 11th July, 19:15h 1868
> > >Moss, Fall 14th July, 10:15h 2006
> > >Lance, Fall 23rd July, 17:20h 1872
> > >
> > > From The Catalogue (2000).
> > >
> > >Makes you think, don't it! Seems to be a
> connection here.
> > >Any info on the trajectory at those falls?
> > >
> > > >although I
> > > >don't think that
> > > >difference is significant.
> > >
> > >Regards,
> > >Bj?rn S?rheim
> >
>
>http://home.online.no/~bsoerhei/astro/meteor/060714/moss.html<Fresh
> > >'Moss'...
> > >
> > >______________________________________________
> > >Meteorite-list mailing list
> > >Meteorite-list_at_meteoritecentral.com
> >
>
>http://six.pairlist.net/mailman/listinfo/meteorite-list
> >
> >Dr. Jeffrey N. Grossman phone: (703) 648-6184
> >US Geological Survey fax: (703) 648-6383
> >954 National Center
> >Reston, VA 20192, USA
> >
> >
> >______________________________________________
> >Meteorite-list mailing list
> >Meteorite-list_at_meteoritecentral.com
>
>http://six.pairlist.net/mailman/listinfo/meteorite-list
>
> Dr. Jeffrey N. Grossman phone: (703) 648-6184
> US Geological Survey fax: (703) 648-6383
> 954 National Center
> Reston, VA 20192, USA
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
>
http://six.pairlist.net/mailman/listinfo/meteorite-list
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
>
http://six.pairlist.net/mailman/listinfo/meteorite-list
>


__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
Received on Thu 31 Aug 2006 11:54:11 AM PDT