-- Forwarded message -
From: Michael Ossipoff
Date: Fri, Oct 14, 2022 at 10:16 PM
Subject: Re: How to turn ecliptic longitude into solar declination?
To: Steve Lelievre
Or you could just use the ecliptic longitude, reckoned as usual from the
Vernal Equinox…multiply its sine
Multiply the sine of ecliptic longitude (reckoned forward or backwards from
the nearest equinox) by the sine of 23.438 or whatever the current
obliquity’s exact value is).
Take the inverse sine of the result.
On Fri, Oct 14, 2022 at 4:57 PM Steve Lelievre <
steve.lelievre.can...@gmail.com>
Hi,
For a little project I did today, I needed the day's solar declination
for the start, one third gone, and two-thirds gone, of each zodiacal
month (i.e. approximately the 1st, 11th and 21st days of the zodiacal
months).
I treated each of the required dates as a multiple of 10 degrees of
