FIG. 1 is a perspective view of an acetabular cup prosthesis positioning tool, showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side elevational view being identical thereto;

FIG. 3 is a top plan view thereof;

FIG. 4 is a top perspective view thereof; and,

FIG. 5 is a front end elevational view thereof.

The broken line showing of the distal tip in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design.