[meteorite-list] Fusion Crusted "Meteoroids"
From: Meteorite-Recon.com <info_at_meteoritecentral.com>
Date: Wed, 25 Mar 2009 17:11:21 +0100
Space weathering due to impingement by micrometeoroids and solar wind particles is another important factor modifying an asteroid's reflectance spectrum. In many cases more recent impacts on asteoids appear brighter than weathered portions.
lebofsky at lpl.arizona.edu wrote:
> Hi Eric:
> A quick response to this:
> 1. Black, yes. Many asteroids are dark (reflect less than 10% of the light
> that reaches them). This may be due to shock (black chondrites) or due to
> the presence of carbon as in the carbonaceous chondrites (or comets for
> that matter).
> 2. However, to the best of my knowledge, fusion crust happens when the
> meteoroid passes through the Earth's atmosphere and so would not exist
> prior to reaching the vicinity of the Earth. I do not think that you would
> bet fusion crust on anything leaving the atmosphere of Mars, since I think
> it is assumed that the impact punches a hole in the atmosphere through
> which the eventual meteorite passes.
>> A week or so ago I asked a question about what a meteoroid would look
>> like floating through space. More specifically I wanted to know what
>> color a meteoroid might be "before" it actually hit Earth. Here's
>> another question.
>> How many beautifully black and fully fusion crusted meteoroids and
>> asteroids are floating around out there in space?
>> Eric Wichman
>> Meteorites USA
>> Meteorite-list mailing list
>> Meteorite-list at meteoritecentral.com
-- Regards, Eric Wichman Meteorites USA http://www.meteoritesusa.com 904-236-5394 ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- www.meteorite-recon.com -- www.meteorite-recon.comReceived on Wed 25 Mar 2009 12:11:21 PM PDT