Re: Possible Hubble Pointing During Double Flare

From: Gerhard HOLTKAMP (grd.holtkamp@t-online.de)
Date: Mon Jul 04 2005 - 17:44:49 EDT

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    Bob Hart wrote:
     
    >Try these coords in your calculations and see what you com up with:
    >RA 13h  36min
    >DEC -09 08min
    
    (Looks like Comet Tempel 1!) If this was the position the HST was pointing at 
    on 3-JUL-05, 2:35:30 UTC then specular reflections from the "aft shroud" (as 
    I now learned from Ed Cannon that the bottom of the HST is called) would have 
    missed the Earth all together and it might have been the side or the lens cap 
    instead.
    
    The HST timeline site 
    
    http://www.stsci.edu/observing/weekly_timeline.html
    
    which Ed Cannon mentioned in his reply didn't seem to cover that particular 
    time and it mentions projects rather than sky coordinates. Still, every now 
    and then a known object is given as a target and on those occasions it would 
    be useful for flare predictions.
    
    Actually, I just checked pointing at Tempel 1 again. Anyone on Big Island 
    Hawaii: If HST is pointing at the Comet on 5-JUL-05, 5:38:30 UTC you might 
    see an aft shroud flare. (More northerly latitudes don't seem to get these 
    "Comet pointing flares" for the moment.
    
    Gerhard HOLTKAMP
    Darmstadt, Germany
    
    
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