[meteorite-list] Russian meteor composition

[E]

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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