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    Re: Precision of lunars
    From: Alexandre Eremenko
    Date: 2007 Apr 24, 12:50 -0700

    Dear Frank,
    
    > You're still not getting very good results,
    
    Actually I thought that the resutls in the last posting are quite
    good.
    I would be very interested to see the comparison pool against which
    you judge them.
    
    Your results, or the results you've seen novices having,
    just show me them, I am really very interested.
    
    I only want to say that a "single good shot" proves nothing.
    If I were to choose a single "typical" shot of the set I recently
    posted,
    then using any reasonable criteria (average, median, whatever you
    propose) it will be a shot with error less than 0.2.
    
    Can you cite or post ANY data or statistics, of XIX or XX
    
     and you're content to believe,
    > following Kelvin, that angles cannot be measured to better than 0.5 minutes of
    > arc accuracy with a sextant. Looking with a 7x or 10x telescope, an angle
    > that large is very obvious. With the limiting resolution of the human eye
    > (corrected) somewhere around 0.7 to 1.0 minutes of arc, the limiting resolution
    > through a ten power telescope is around 0.1 minutes of arc. So we can certainly
    > "see" angular shifts smaller than 0.5 minutes of arc. What's your latest
    > theory  on the reasons you've been unable to do as well as you would like with
    > your  observations?
    >
    > -FER
    > 42.0N  87.7W, or 41.4N  72.1W.www.HistoricalAtlas.com/lunars
    >
    > ************************************** See what's free athttp://www.aol.com.
    
    
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