Relative Energy orbit period diameters
orbit diameter relativity
CSDA latus rectum is average diameter and energy of every M1M2 stable orbit. Average diameter is slope one energy tangent event. (v) on any orbit curve is a direct geometric proportion because all orbit energy is relative with average diameter parameters.
((slope 1 event)/(energy slope 1)=(((+position vector)/2)^(-1) )/v)
solve for (v) to find (v) on period orbit curves.