[meteorite-list] re: meteorite lands near Mt. Fuji Japan

[E. L. Jones]

Dirk can add to this as he wishes, however Mt Fuji is around 
12,400ft±--(I walked up part of it and am still out of breath 2 years 
later)  Any trail falling below the near crest would indicate 
incandescence below 12,000. (2miles±) and would be sufficient for 
estimating 10k ft.

 Somewhere, I read that active incandescence can't exist below 5 miles 
as the air is too dense for your typical meteoroid to maintain 
incandescence generating velocity  I however, observed a bolide that may 
have exploded at certainlky less than 4 and possibly around 3 miles 
using artillery observer methods and from which a 2kg meteorite was 
recovered.  So I am not sure how valid the 5 mile barrier is.  I hope we 
get some more data.  Does anyone have a reference to altitudes where 
incandescence is extinguished?

Recovering a meteorite from that vicinity is problematic owing that it 
is a series of lava flows and part of it is a US Marine tank gunnery range.

Elton

Marco Langbroek wrote:

> Dirk, I am wondering: how can you know the end altitude? You have to 
> triangulate photographs or video images taken from at least 2 
> well-separated locations to know that. Also, this end altitude would 
> be quite low for a meteorite, although not entirelly impossible.
>
> - Marco
>
> -----
> Dr Marco Langbroek
> Dutch Meteor Society (DMS)