A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2019 Dec 14, 05:36 -0800
Re : Time-full-moon-Hebard-dec-2019-g46393
Let us first define a "Geocentric Fictitious Sun" as follows :
Fictitious Sun RA = Apparent Sun RA + 180 °
Fictitious Sun Dec = Opposite of Apparent Sun Dec
Fictitious Sun Distance = Equal to Sun Distance.
We can then define "Full Moon" as being the time of minimum geocentric distance between apparent Moon Center and Fictitious Sun Center. This is not the official definition, but it is at least as good as the official one since it does have a meaningful and solid physical sense and since it also does NOT depend on the coordinates system being used for such computation.
TT - UT = +69,55 s
I find "Full Moon" time as being 2019-Dec-12 at 05h30m39.6 UTC with the Software I am using, i.e with Sun Apparent position Maximum Error 0.3"and Moon Apparent position maximum error.4.5 "
I trust that with the above definition and given the uncertainties mentioned here-above, the "true" time of full Moon is within +/- 20 seconds of time of the result published hereabove.
To you Paul Hirose ( Re : Time-full-moon-Hirose-dec-2019-g46404) it might nice to get your own results here if you can easily program such "unorthodox" Full Moon Time Definition from your current software.
Best Friendly regards to all, with my best wishes for Merry Christmas 2019 and Happy New Year 2020.