* HIPOP: if (kz(8).gt.0.and.kz(18).gt.1)
*
*       SEMI    Max semi-major axis in model units (all equal if RANGE = 0).
*       ECC     Initial eccentricity (< 0 for thermal distribution).
*       RATIO   Mass ratio (= 1.0: M1 = M2; random in [0.5-0.9]).
*       RANGE   Range in SEMI for uniform logarithmic distribution (> 0).
*       ICIRC   Circularization & collision check (not implemented yet).
***
