NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2012 Apr 11, 00:28 -0700
Dear Paul,
One excellent, convenient and easy way to verify the accuracy of various Precession models is to compute the Sun Ecliptic Latitude in Mean Ecliptic of Date for remote periods, through starting from Coordinates computed in Ecliptic 2000, which is the reference computing plan/frame for most if not all planetary Theories nowadays.
The Sun Ecliptic Latitude should change sign twice a month and should remain within [-1", +1"] because the Moon Mean Orbital Plan is forced by Gravitation to be (almost) identical to the Mean Ecliptic of date. This at least has kept standing true for a few 10000's years back, and probably even (much) more.
You will find here-enclosed a translation I just performed to your intention of the Note I sent to Bureau des Longitudes IMCCE in March 2011.
I will very kindly listen to any feed back you might have here.
Until then, please accpet my Best Regards
Kermit
Antoine M. "Kermit" Couëtte
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