O.K. there are probably some other sites that already cater for this,
but if anyone wants a mathematical "low down" treatment of planetary
positions from what I like to call a "classical" (yet simplified)
approach, there is an algorithm here:-


Help yourselves to some spare time number crunching... the way things
had to be done in the good old days before arrival of the home

Abdul Ahad

[s.a.r. mod. note: inappropriate cross-posting removed and followup
set. Followups welcome on s.a.r. but only if they're to do with the
science -- mjh]