Not even sure what the flash period of Intelsat 501 is, video of 2 flashes, one naked eye

From: Kevin Fetter (
Date: Fri Mar 30 2007 - 12:21:30 EDT

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    I find that Intelsat 501 ( 12474 ) has different flash periods, for different surface causing the flashing
    For example, for video I still have for a few minutes of it, I observed flashing at roughly
    All times UTC ( Mar 29 )
    So one flash would be followed by another by roughly 1 min 15 seconds, with a gap of 2 min 30 sconds, to the next series of flashes ( the one's seperated by that 1 m 15 seconds of time )
    Video of one of the flashes, the brightest
    Sat at
    16 h 12 m R.A
    -14 deg 51 min Dec
    27 arc minute wide feild of view 
    Video of Bright flash, to Mag 6
    You should hopefully see 2 quick fainter flashes, followed by the bright flash. So different surfaces causing the flash.
    Sat at
    14 h 45 m R.A
    -10 deg 17 min Dec
    3.5 degree Feild of View
    Based on the video over 1/2 hour, not very reliable for bright flashes, brighter then Mag 7. That was the only one I spotted that was detectable.
    So not very nice to observe, looking for really bright flashes. 
    Tonight if clear, I'll go record NSS K ( 21989 ) to look out for any bright flashing coming from it. Haven't observed it since Dec 21, 2006 when it was flashing every 36 seconds, nice and bright
    44.6062 N
    75.6910 W
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