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    Re: Daytime Venus Rising Dip Short
    From: Alexandre Eremenko
    Date: 2012 May 3, 18:14 -0400

    Greg,
    
    I like your detailed report but you do not mention one
    crucial thing: what was the local time of your observation?
    :-)
    I could find Venus several times from my balcony shortly before the sunset
    with a naked eye, and about 1 hour before the sunset with a sextant.
    Bill B wrote yesterday that he is also employing his new 7x prismatic
    scope for the search of Venus.
    
    Soviet Cel Nav manuals recommend shooting Venus in daytime
    to obtain an immediate fix, the second line coming from the Sun.
    (I mean when Sun and Moon are not available).
    They emphasize that this way you obtain the most precise fixes.
    
    Alex.
    
    On Thu, 3 May 2012, Greg Rudzinski wrote:
    
    >
    > Today Venus was observed during the day from my boat dock using a dip short 
    horizon to the opposite side of the harbor (.157 NM) from an exact height of 
    eye of 6.5 ft.. To prepare it was necessary to pre-calculate for an azimuth 
    of 76* which gave me a 4* wide short horizon. Index error was checked by 
    measuring the Sun's diameter on and off the arc. The measurement came in at 
    31.6' on and 31.6' off for zero error. My lucky day :) The online dip short 
    calculator gave me a - 23.7' correction to apply to the (Hs). At the 
    pre-calculated time the Tamaya Jupiter was raised and Venus showed herself as 
    a faint elongated oval in the 7x35 scope. Five observations were done with an 
    average intercept of 0.7' A and a spread of 0.9'. A CN first in the log 
    books.
    >
    > A rather large sunspot is now visible. About the size Venus will be when she 
    transits the Sun on the 5th of June during the late afternoon here in 
    California. (see image 3277)
    >
    > Greg Rudzinski
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    > Attached File: http://fer3.com/arc/img/119358.img_3277.jpg
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