Irrotation case

The orbital angular vel.     : Ω = 0.012

The angular momentum     : J = 3.5

The collision vel.	         : vx = 0.071
    (in x-direction)

The total grav. mass	         : Mg= 1.95

The ang. mom. parameter  : q = 0.93

                   )
                      　　2


                      　　g

   (q = J/M