Bright Sat Photometry?

From: npr61 (npr61@bellsouth.net)
Date: Sat Sep 12 2009 - 23:17:53 UTC

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    Hello:
    
    Are there available software that could be used for comparative 
    photometry of a bright sat, i.e. ISS, trail?  Have been toying with the 
    idea of buying a used Digital Rebel, fitting it with a 50mm f/1.8 lens, 
    and then taking short, say 8-12 second unguided exposures of the ISS 
    against brighter background stars.  Ideally, it would be nice to be able 
    to create a rectangular aperture over all or a portion of the ISS trail, 
    with circular apertures for the ref/check stars.
    
    I've no background in this subject other than a lot of reading over the 
    last few months. The goal would be a simple and fun way to put 
    brightness numbers on a given pass, to perhaps the accuracy of that of a 
    good visual observer.  Am very much considering AIP4WIN for general 
    knowledge, but don't think that it could perform the task.  On the other 
    hand, wrestling with something like IRAF would perhaps defeat the "fun" 
    intent.
    
    Any advice would be welcome.
    
    Thanks,
    
    Neal Robichaux
    29.9884N
    92.1498W
    
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