set verbose level to ..1.. nbody is 2 duration is 2.0000e+10 year = 6.3115e+17 sec timestep is 3.1500e+12 sec print_interval is 3.1500e+15 sec recenter_flag is 0 will use the RK4 technique nbody 0 has name ..MW.. mass .. 2.00000e+43.. pos 0.00000e+00 0.00000e+00 0.00000e+00 vel 0.00000e+00 0.00000e+00 0.00000e+00 nbody 1 has name ..M31.. mass .. 2.00000e+43.. pos 2.40000e+22 0.00000e+00 0.00000e+00 vel 3.00000e+05 0.00000e+00 0.00000e+00 initial KE 9.00000e+53 initial GPE -1.11217e+54 initial E -2.12167e+53 initial angmom 0.00000e+00 0.00000e+00 0.00000e+00 final KE 2.95820e+61 final GPE -3.36178e+49 final E 2.95820e+61 final angmom 0.00000e+00 0.00000e+00 0.00000e+00 delta_E 2.95820e+61 frac 1.39428e+08 delta_angmom 0.00000e+00 frac nan all done