Many thanks, an excellent section 3 as usual. I will post the final version of Sections 1 and 2 later today. Then the three sections can be assembled and posted as usual by Dave
This is the rewritten section 3.
Horst
Am 26.03.2018 um 13:49 schrieb Myron Evans:
It is clear from the apsidal method that the change in the ellipse is a precession, because the apsidal angle is no longer pi.