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    Re: NA daily pages, moon
    From: Bill B
    Date: 2008 Oct 31, 01:27 -0400

    Thanks Frank
    
    > For
    > another example, why do we need to know the moon's percent illumination (to
    > the nearest percent)? The percent illumination was added in the 1980s. Why
    > wasn't the small phase diagram sufficient?
    
    Slipping into astronomy, at what time/longitude is the exact percentage
    quoted? When I see it at 86d W can it be the same percentage as the
    time/longitude used for the percentage? (I've never quite figured out all
    the moods of the moon.)
    
    On the warm-fuzzy side it changes so much day-to-day it is just comforting
    to know vs. the diagram.  Percentage coupled with rise/set/or meridian
    passage is also a nice way to determine the day in a lifeboat situation if I
    recall.
    
    On a more practical side for lunars mavens, I like to look at the raw sun
    vs. moon meridian passage times to determine when the relationships are
    within range.
    
    A sliver may be theoretically visible during daylight, but below a certain
    percentage I am totally unable to see it with the naked eye, as well with
    the sextant scope.
    
    Bill B.
    
    
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