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    Re: Sun and Full Moon visible simultaneously
    From: Bill B
    Date: 2015 Aug 29, 15:10 -0400

    On 8/29/2015 2:32 PM, Don Seltzer wrote:
    > But consider refraction, which extends the period for which both bodies
    > are visible.
    > In Boston this very evening, the full moon will rise at 7:16 pm and the
    > sun will set 8 minutes later.
    
    But is it a *full* moon, 100% illumination?
    
    Regarding my thought of full moon and sun visible visible at very high
    latitudes near summer solstice, that could not happen this year as the
    full moon had a high southern declination, and north declination near
    the southern hemisphere summer solstice. I did not see other NA daily
    entries where both would be visible book ending of the solstice. Doesn't
    mean they are not there, only that it was not readily apparent to me.
    
    Is there a year during the moons 19-year cycle when the full moon will
    have a large north declination near summer solstice (or the reverse for
    down under)?
    
    Being literal, Mark's question was, "P.S. can somebody please tell the
    full moon to come out in the daytime this weekend, I want to try out my
    new higher magnification prism scope on my lunar sun sights " Not "if"
    or "when. " I believe this may have been tongue-in-cheek humor.
    
    And why would one need a full moon for a sun lunar? If it did exist in
    nature it could pose  problem, being fully illuminated for a brief
    period of time in specific regions.  If not 100%, how do you tell the
    near from the far limb unless it is decidedly before or after full?
    Other than than knowing the exact 100% where and when, waxing or waning
    is your only clue.
    
    
    

       
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