- #36
fizzy
- 193
- 17
OK, I have finally got the bottom of this. The polynomials given on that link are obtained by differentiating Chapront's polynomial to get rotational speed and then using the first order term of the Taylor expansion : 1/(1-x) = 1+x to get a polynomial for period.
In the case of lunar apsidal period the result is accurate to 8s.f. back to 1000BC.
I have suggested the author include the second Taylor term and state the approximations being made and the expected accuracy ( giving 12s.f. in the coeffs is misleading ).
In the case of lunar apsidal period the result is accurate to 8s.f. back to 1000BC.
I have suggested the author include the second Taylor term and state the approximations being made and the expected accuracy ( giving 12s.f. in the coeffs is misleading ).