(meteorobs) Meteorites on The Ground! (Was: To Dirk)

[Bomber2 Panther]

How large (size, weight) was 2008 TC3 estimated to be and considering the recovered fragment's density is it possible to obtain an accurate measurement?
Obviously the entry angle and initial velocity of the asteroid/meteoroid would have a bearing on what is recovered, too many variables to think that this can be simply explained and applied to all cases.
 
My 2 cents worth........
 
Cheers, 
Chris W
 
> Date: Fri, 25 Mar 2011 16:45:08 -0700
> From: eric at meteoritesusa.com
> To: meteorobs at meteorobs.org
> Subject: Re: (meteorobs) Meteorites on The Ground! (Was: To Dirk)
> 
> Quote: ""Three quarters of the rock, which was about the size of a small 
> pork pie, was burnt off in the experiment."
> 
> So only 75% of a body is ablated during atmospheric entry? This 
> disproves the 90% ablation rate hypothesis and actually proves my point.
> 
> And this only with one simple experiment. (if this data is accurate of 
> course) It is still inconclusive evidence though that 99% of all 
> meteoroid bodies ablate away to nothing. In fact it's logical evidence 
> contrary to currently accepted scientific hypotheses that say the 
> ablation rates are so very high, because we have no way of knowing the 
> size of 99.9% of the bodies BEFORE entry into the atmosphere. In fact 
> there is only ONE case where we knew the size of a *natural* body before 
> it entered our atmosphere and impacted Earth, and that's the very well 
> known, and perhaps famous, Asteroid 2008 TC3.
> 
> Therefore the conclusion becomes one that incorrectly supposes and 
> assumes that since the ablation rates are so high, that an equally high 
> percentage of meteoroids burn up completely within the atmosphere. It's 
> just a jump in logic that doesn't work. It's logically incorrect based 
> on the current data.
> 
> I'm curious how this 75% number was determined. Was every piece that 
> remained of the body, that survived atmospheric entry recovered? (in 
> other words, what were the methods?) Because recovery rates will vary 
> based on a number of factors including but not limited to, terrain, 
> color, contrast of the specimens with local soil color, and the eyesight 
> of the individual(s) recovering the specimens.
> 
> Further... How many specimens of any meteoroid bodies that impact Earth 
> are actually recovered? What's that percentage? You would have to 
> recover every single piece that survived entry to determine an accurate 
> estimate of others and that still doesn't take into account the variable 
> composition factor. And to do that you would have to have a perfectly 
> controlled environment. This is a good example of a control, for 1 type 
> of stone. And it answers a lot of questions. But like any good 
> experiment/answer, it brings with it more questions.
> 
> How big is a pork pie?
> 
> Regards,
> Eric
> 
> 
> On 3/25/2011 3:51 PM, Steven Kolins wrote:
> > On Mar 25, 2011, at 5:20 PM, Roberto G. wrote:
> >
> > 
> >> http://news.bbc.co.uk/2/hi/uk_news/scotland/highlands_and_islands/7056686.stm
> >> 
> > This is the prerelease for the results:
> >
> > <http://www.abdn.ac.uk/mediareleases/release.php?id=1523>
> >
> > = - - - - - - - =
> > Steven Kolins
> > mailto:smkolins at mac.com
> > http://homepage.mac.com/smkolins/
> > http://smk99.blogspot.com/
> > Possess a pure, kindly and radiant heart!
> >
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