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    Re: Chuck's Lunar
    From: Bruce Stark
    Date: 2002 Mar 22, 11:13 EST

    Chuck,
    
    The values I got were:
    
    Average watch time of observation: 00:15:29
    Ds, average sextant distance: 37� 43.2.
    
    Reduced to that time, Venus above horizon: 7� 8.'7.
    Moon's lower limb above horizon: 44� 17.'6.
    
    From table 1, adjustments for dip and semidiameter were -3.'1 and +11.'9 for
    Venus and the moon, respectively.
    
    Sa, apparent altitude of Venus: 7� 5.'6.
    Ma, apparent altitude of moon's center: 44� 29.'5.
    
    From table 2, moon's refraction and parallax: 38.'32.
    From table 3, Venus' refraction and parallax: 7.'21.
    From table 4, moon's augmented semidiameter: 15.'17.
    
    D, the cleared distance: 38� 42.'9.
    
    D1, distance at 00 hours: 38� 34.'8.
    D2, distance at 01 hour: 39� 2.'3.
    
    GMT per observation: 00:17:40, March 19th.
    
    You may get slightly different average values by graphing than I get by
    arithmetic. For proportioning, if you use a calculator to proportion the
    altitudes to the average time of the distances, and to find the GMT that fits
    the distance, you should get the same degree of accuracy I get with tables 7
    and 8.
    
    It's quite possible I've made a mistake somewhere. I double check as I go
    along, but still make mistakes sometimes.
    
    More after breakfast.
    
    Bruce
    
    
    

       
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