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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Unexpected USNO height correction precepts
From: Andrés Ruiz
Date: 2018 Sep 25, 08:25 +0200
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From: Andrés Ruiz
Date: 2018 Sep 25, 08:25 +0200
At http://aa.usno.navy.mil/data/docs/celnavtable.php It is said that:
"The data for Venus has not been corrected for phase; under certain conditions this could displace the center of light up to 0.3 arcminutes."
But the question is: why do you need to correct for phase when taking a sight with a marine sextant?
And, what for the moon?
If you eye is sharp enough and ones can see the spot of light, or the limb it is not necessary, isn't it?
