NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
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
32!54."
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.
-FER
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