def PNT2Tidal_Tv12(XA):
    """ TaylorT2 1PN Quadrupolar Tidal Coefficient, v^12 Timing Term. 
   XA = mass fraction of object """
    XATo2nd = XA * XA
    XATo3rd = XATo2nd * XA
    return 3179 / 4 - 919 * XA / 4 - 1143 * XATo2nd / 2 + 65 * XATo3rd
