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    Re: Lunars and accuracy generally
    From: Frank Reed
    Date: 2013 Jan 7, 09:36 -0800

    Bill B. wrote previously:
    "Your online almanac lists the Sun's SD as 16!27, yielding a diameter of

    And I answered:
    "I don't know if I would trust the hundredths digit in this case. "

    Well, I've changed my mind. You CAN trust the hundredths digit to +/-1. So if my online Nautical Almanac says that the diameter of the Sun is 32.54' then you can count on it being within the range 32.53' to 32.55', so no concern for any celestial navigation observation that I can think of.

    And to reiterate regarding the context, Greg's determination of the Sun's diameter using his sextant manually was actually a bit more accurate than his determination with his digital camera.

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