Duration is not a reliable way to distinguish between meteors and space junk. You can only do that using velocity, which is difficult to do from one vantage point. I've recorded re-entering debris that only glowed for a few seconds.

Chris

*******************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 8/25/2013 6:46 AM, [email protected] wrote:

Twenty seconds?  Sounds like  re-entry debris.  Anyone else?>>

too short in duration for  re-entry debris...
geozay

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