[meteorite-list] Russian meteor composition

From: E <eegohee_at_meteoritecentral.com>
Date: Sun, 17 Feb 2013 14:51:27 +0800
Message-ID: <D3642442-24C8-483E-8431-ED3BADCC12E6_at_gmail.com>

Could the pink red colour be a reflection of the sun? It usually happens during sunrise/sunset when airplane contrails turn pink and red.

On 17 Feb, 2013, at 7:25, "Nicholas Gessler, Ph.D." <nick.gessler at duke.edu> wrote:

> Hi Rob et al,
>
> I've spent several hours searching for different video footage of the
> fireball, the "smoke" trail, the hole in the ice, etc.
>
> First, can anyone point me to any scientific papers which attempt
> to correlate:
> a) the color of the "smoky" tail, and/or
> b) the color of the "fireball"
> with the type of meteorite?
> If so, I'd appreciate the reference(s).
>
> It always seemed to me that the "smoke" was so white as to resemble
> condensed water vapor than any "burnt material." At a couple of
> intervals, some pink or orange tint appeared, but the trail was almost
> purely white. That suggests to me that the meteoroid was largely
> ice, but I am no expert.
>
> There are several videos zoomed in of the fireball itself (unless they
> are fakes). The color was orange-red, but perhaps if someone could
> access the camera(s) taking the pictures one might get a clearer assessment
> of the emitted spectrum.
>
> One thing that was notable from the fireball and the "smoke" cloud
> photos was that the object appeared to be quite flat and stable, the
> flames apparent at the two sides, with no flames in between. The
> "smoke" cloud seems to confirm this.
>
> I don't think the symmetrically bifurcated incandescence and tail could
> have been produced by an object broken in two. It looks like one
> object "burning" at both ends. Perhaps some experts in flight dynamics
> could tell us under what conditions we could expect that behavior.
> Any pointers to literature on the bifurcated entry would also be
> appreciated.
>
> Cheers,
> Nick
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Received on Sun 17 Feb 2013 01:51:27 AM PST