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    Re: Additional altitude correction for Venus
    From: Stan K
    Date: 2015 May 15, 11:37 -0400
    It's tough getting old.  This statement was already in the Help of my own Celestial Tools program.

    "The planet Venus exhibits phases like the Moon, which can be seen with optical aid.  From 1952 to 1984 the additional corrections for Venus 
    listed in the Nautical Almanac allowed for both parallax and phase.  The phase correction was required because the tabulated position was for the 
    planet's center of disk.  Before 1952 and since 1985 the tabulated position of Venus is for its center of light, and the phase correction is incorporated 
    into the tabulated value of GHA."

    The last words should probably be "GHA and Dec", but the fact is I already had the information.  i don't recall where I got the years (Frank?), but I would not have included them if I did not feel that they were correct.


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