Re: Last Night's ISS Jupiter 'Transit'

From: Thomas Fly (tfly@alumni.caltech.edu)
Date: Fri May 14 2004 - 18:32:14 EDT

  • Next message: Steve Newcomb: "8859 obs may 15"

    Sour grapes here:
    http://www.satobs.org/seesat/May-2004/0139.html
    
    I used Image Preview to magnify the photo until Jupiter had a diameter of 3.5"
    on my screen; the width of the ISS streak was then about 2.2", and it was about
    11" from the center of Jupiter to the center of the ISS.
    
    Jupiter currently has an angular size of 43.3" (1/5000 radian), so the width of
    the ISS streak is about:
    
    43.3" / 206265" per radian / 3.5 * 2.2 * 267.5 miles * 5280 ft/mi / 3.28 ft/m =
    57 meters
    
    Using that same method, the miss would be by about 57 m * 11 / 2.2 = 284 meters
    (310 yards)
    
    which doesn't strike me as an horrendous position error, but it'd have been
    nicer to have scored a direct hit!
    
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