Creating UCS and making it active.

Hi everyone, I am trying to create a new UCS and then making it active. The new UCS coordinate is

  Origin(0,0,0)

  X direction(1.8963581, 0.36861467, 0.51763809)

  Y direction(-0.190809, 0.98162718, 0.0)

Any help would be appreciated,

Thank you,

-J