This field displays the currently entered value of the mass ratio
This is the value for which the libration points will be computed when the
Compute Libration Points button is pressed. To change the value of mu,
open up the
Initial Conditions and System Parameters Panel
(titled in DsTool as the Selected Point Panel) and re-enter the desired value of mu in the
corresponding entry field. The defualt value for mu is the sun-earth system value.