Re: Progress and ISS

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Tue Aug 08 2000 - 17:15:57 PDT

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    Edward S Light (light@argoscomp.com) wrote:
    
    > This morning, despite some scattered fog and haze, we saw the ISS
    > and the new Progress M1-3 supply ship ...
    
    Here, in spite of our typical low, fast-moving broken clouds and some
    dawning light, I was able to observe Mir (11:02), ISS (11:12-13), and 
    Progress (11:20-21).  The clouds hindered Mir the most, partly due to
    it traveling in the same direction as they.  All three passes were 
    very good, very bright ones.  I was quite surprised at the brightness 
    of the Progress -- seemingly not a lot fainter than ISS itself.  I
    didn't know they could be that bright.
    
    Iridium 920 (24871, 97-34C) did a great pass here last night.  If you 
    get a southbound evening pass going near the zenith and like to watch 
    a lot of rapid flashes that get brighter and fainter and brighter and 
    fainter, have a look!  (I wonder how much the quality of light show it 
    puts on depends on the observer's latitude...?)  Viewed using 
    magnification, it's obviously flashing at least twice per second.  In 
    a way it's kind of like EGP/Ajisai, because it flashes a few times 
    regularly, goes into a brief chaotic flashing episode, and then resumes 
    the regular flashes.
    
    Gorizont 14 (17969, 87-40A) was again last night very easy.  On this 
    time around at least, it has certainly been one of the easiest flashing 
    near-geosynchs to find that I've looked for with my handheld
    binoculars:  
    find the right spot in the sky to within a couple of degrees, watch 
    while counting to 90, and sometime during the count -- flash!  Then, 
    more than an hour after first sighting it, after I got home from the 
    observing site, I located it easily again from the very light-polluted 
    parking lot outside of my apartment.  It drifts several degrees to the
    west from night to night.
    
    Clouds and probably rain here tonight.
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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