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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calculate the declination of the Sun in your head
From: Joshua Hunley
Date: 2021 Mar 3, 18:53 -0800
From: Joshua Hunley
Date: 2021 Mar 3, 18:53 -0800
Ooppss... For declination the correction to the differences between cycles ranges smoothly from 0" to 59" for each increasing cycle. Using 2020-2023 as a baseline, using averages, declinations differences from each year's ZERO for 2048-2051 could increase by as much as +7' from the 2020-2023 differences.
(Numbers here and in my previous post are are averages across the cycles from 2020-2023 through 2048-2051 based on solar terms calculated by JPL Horizons, https://ssd.jpl.nasa.gov/horizons.cgi)
--
Josh
