RE: ISS crossing the moon tonght

From: Matson, Robert (ROBERT.D.MATSON@saic.com)
Date: Wed Apr 17 2002 - 20:04:55 EDT

  • Next message: Sue Worden: "Atlantis & ISS"

    Hi Tom,
    
    > The subject I discuss here is where to be to see a transit
    > of the moon by the International Space Station tonight. I
    > also explain how I made the determination.
    
    I ran transit predictions through SkyMap using the following elset:
    
    ISS             20.0 10.0  0.0  0.5 d  124
    1 25544U 98067A   02107.58333333 -.00000508  00000-0  00000+0 0  3202
    2 25544  51.6369 357.3923 0008316 345.8780 135.4011 15.57606929194578
    
    Plugging in the coordinates of your four sites, they're all a
    bit west of the transit centerline, suggesting that either
    a different elset was used, or perhaps there is a systematic
    error in the lunar location.  In any event, here are my
    corrections (assuming you keep the latitude unchanged):
    
    41.1400N, 104.600W  -->  41.140, 104.48
    37.753 N,  99.350W  -->  37.753,  99.22
    34.746 N,  95.250W  -->  34.746,  95.14
    32.815 N,  92.856W  -->  32.815,  92.73
    
    While the errors only average about 0.12 degrees in longitude
    (about 6 1/2 miles), this is more than enough for the track to
    miss the moon.
    
    Cheers,
    Rob
    
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