n mass radius x y z vx vy vz fix_x fix_y fix_z
1 1    0.28   0 0 0  0  0  0     1     1     1
2 1    0.28   4 0 0  0  0  4     0     0     0
3 0.1  0.18   5 0 0  0  0  6     0     0     0