Re: Request for identification

From: Tyler MacKenzie (
Date: Tue Dec 14 2004 - 13:45:22 EST

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    Hi Oscar and others,
    I assumed that the "30 minutes" observation time did not refer to the 
    photo's exposure, which I think was a simple snapshot of some 
    phenomenon that lasted 30 minutes.
    Could the phenomenon be a persistent exhaust trail from an airplane? 
    I have often seen short trails like this left behind for some time in 
    the sky after the airplane is long gone into a different airmass 
    where their trail disperses more rapidly. I think 30 minutes is quite 
    reasonable for such an artificial cloud to be visible - especially as 
    low on the horizon (far away) as in the photo.
    >"Oscar A. Rodriguez / PMEE-SPACE" wrote:
    >>  I received a photo via e-mail yesterday. It depics what it appears to be >
    >an airplane trail in the sky.
    >  >The observation
    >  > lasted around 30 minutes
    >I have my doubts about those 30 minutes observation time. Everything would
    >be highly overexposed
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