ISS near-moon pass observed at civil twilight

From: Robert Holdsworth (robbonz1@xtra.co.nz)
Date: Sat Jul 04 2009 - 01:33:08 UTC

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    Last night at 1720 our time (0520 UTC) - not exact but within 1 minute- from 
    the Wellington waterfront at 174.779E 41.285S  I observed the ISS 1X as it 
    passed closed to the Moon.
    
    Calsky was predicting a transit to the East of here but unfortunately not in 
    a convenient location for me to travel to at that time- not far as the crow 
    or ISS flies, but about 90 minutes to two hours by road over hills and 
    valleys!
    
    It was about 17 minutes after official sunset though because of hills the 
    sun disappears earlier than that: civil twilight ended 14 minutes later.
    
    I did not have binoculars with me, and the ISS was only visible for a short 
    time before and after it passed by the moon.    It was quite clearly visible 
    as it passed, though not as bright as the moon.  However in view of the 
    visibility when  no other celestial objects could be seen, I suspect the ISS 
    could well have been brighter than the mag -4.3 predicted by Calsky.
    
    Robert 
    
    
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