@Walter. Sorry my last sentence reads like a "brush off". Not my intention at all. I just meant I dont want to pester you with a torrent of questions that could be avoided by my learning some more basic celestial mechanics.
@Walter. If you are happy to keep discussing your answer further then I am happy to keep asking questions. If a further revision or refinement of your peturbation analysis should lead to matching the GR formula then the "glory" will obviously be yours.
Discussion on answer by Walter: Deter…
Discussion on answer by Walter: Deter…