From: David Jonsson
> Integral from -r0 to +r0 of (r0^2-r^2)/(R0-r)^2 dr > > r0 is radius of star. R0 is distance to star center from a > satellite of the star. > > The integral is most often approxiamted with something proportional to > 1/R0² which is the case when r0 -> 0. I think the approximation is too > course for modern precision demands. > > David Im still wading through a weeks worth of email, having been on vacation. So I dont yet know if someone has already responded to this query. But yes, I do recognize 1/r^2. Ive been using this simple formula in my own Celestial Mechanics research for several years now. Ive also been experimenting with hybrid formulas as well. Ive been researching not so much what might be called the Macro Celestial Mechanics aspects but more the theoretical/mathematical chaotic aspects, particularly when ones feed-back approximations are too coarse. Im fascinated with what Im uncovering. BTW, Mauro Lacy suggest googling "Miles Mathis", for an entertaining read on certain formulas used in regards to Celestial Mechanics. Ive waded through Mathis article on Mercurys Precision. Lots of interesting stuff there. Hope this is helpful. Regards Steven Vincent Johnson www.OrionWorks.com www.zazzle.com/orionworks

