A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Steve E. Bryant
Date: 2017 Mar 3, 01:58 -0600
Thank you Sean C,
I suspected that the SHA and Aries would be involved, and in a way I suppose that they are; thank you for thinking that through.
I am not at all fluid in these maters but now that I have this lead I may be able to reason through it more easily. Thank you again!
From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Sean C
Sent: Friday, March 03, 2017 1:14 AM
Subject: [NavList] Re: Retrograde motion of the planets
I could be wrong here, but it seems to me that it can be done this way: If one subtracts the GHA of the body from the GHA of Aries, the RA of the body is obtained. If, when subtracting the RA of a particular hour from the RA of the following hour, a negative value is obtained, then the planet is in retrograde motion.