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    Venus Lunars
    From: Jeremy C
    Date: 2010 Apr 16, 19:49 EDT
    Frank wrote:
    I'll have to take a look at his spreadsheet again. I seem to recall there was some other Venus issue, but maybe I'm wrong.
     
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    I would love for you to do that, since I am now comparing Peter Hankel's spreadsheet with Mr. Pearson's as well as the StarPilot calculator for lunars.  I am finding that the calculator doesn't seem to like planets and stars and always gives me gross errors.  The instructions are minimal and the calculator doesn't use the standard "near" or "far" but "inner," "outer" and "center."  I am getting excellent sun/moon lunars now with all of them, but the calculator didn't do well with Jupiter or Anatares.  I don't know why.  I am also wondering if you are still planning on some sort of stand alone version of your program as the internet is spotty here.
     
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    Frank wrote: What magnification is your telescope? Could you post the dates when you've shot some successful Moon-Venus lunars (just the dates is enough)?

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    I use a Celestaire 7x scope at all times these days.  With Venus i typically use the perceived center of the body.  As for dates they were 13 June, 9 through 15 July, 8 through 15 September all 2009.

    You added:
    "The sun lunars were terrible for some reason, but for whatever reason, I am doing much better with them on this trip."

    Sometimes there's just plain old luck. :)

     
    I don't believe in luck in this stuff.  Something was wrong and it bothers me that i can't figure out what it was.  Nothing was wrong with my technique as it hasn't changed and the errors have gone from 15 minutes down to low fractions of a minute.  It was a major reason i went looking for alternative reduction methods.
     
     
    In a slightly unrelated topic, I am looking to release my navigational log from last year but need to break it down as the file is a 54 MB pdf and that is a bit too much.   I just need to figure out good breaking points.  I would also love to work with you Frank to see if you can't produce one of your voyage maps as an illustration for my book.  I have noon positions for every day we were underway so it shouldn't be too difficult.
     
    Jeremy
       
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