Some "corkscrewing" effects might also be caused by an aerodynamic vortex in the wake of the meteorite (rather than by spinning or tumbling).
Mark > I think that a person took a famous photo of the > Pasamonte fireball as it was happening with a camera. > According to him, and Nininger who reported it, it > corkscrewed in flight. > > Steve Schoner/AMS > > > --- Marco Langbroek <[EMAIL PROTECTED]> > wrote: > > Be carefull here. The dusttrails and/or persistent > > trains left by meteorites > > will start to twist after formation due to high > > altitude winds, often > > creating a cork-screw pattern in the dust-trail or > > persistent train. I've > > seen it happen many times with persistent trains of > > fireballs. It sometimes > > happens in seconds. This is not due to the meteorite > > itself cork-screwing > > down, but it might lure an eye-witness in thinking > > it was. > > > > This is not to say that I want to discount the > > possibility some do, but it > > is a fact, I have never seen any good photograph of > > a bright meteor > > corkscrewing, other than a few where the effect was > > instrumental (introduced > > by camera-movements), or likely to be so. > > > > - Marco ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
