A space station Radar locates sattelites A and B at a certain moment:

A_0=(a_1,0,1^3), B_0=(0,b_2,b_3)

the space station is located at (0,0,0) and the sattelites moves with a uniform velocity related to the space station:

v_A=(V_A,0,0), v_B=(V_B,V_B,0)

what is the minimal distance between the sattelites A and B?