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    Re: Venus-Jupiter 'lunars'
    From: Norm Goldblatt
    Date: 2015 Sep 5, 12:29 -0700

    Through the month of July, I took nightly readings of the separation between Jupiter and Venus using my Traughton and Simms sextant.  I attach the results.  Frank, alas I didn't include refraction. My rationale was that they were very close together and about the same altitude.  Also, I was often late  by about 1/2 hour (after 9PM, which I used to generate ephemerides. But, the rate of change was pretty slow- about a minute per hour.  Also, any attempt to account for the finite sizes of the planets was doomed to failure as I couldn't resolve the discs.  

    I gained tremendous familiarity with my instrument. Looking forward to taking some real shots and becoming familiar with sight reduction.  Thanks again Frank for suggesting the exercise. 

    Norm



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