We report on the results of a 14 year long VLBI study of proper motions in the IC 133 H _ { 2 } O maser source in the galaxy M33 .
The method of Ordered Motion Parallax was used to model the 3-dimensional structure and dynamics of IC 133 and obtain a distance estimate , 800 \pm 180 kpc .
Our technique for determining the distance to M33 is independent of calibrations common to other distance indicators , such as Cepheid Period-Luminosity relations , and therefore provides an important check for previous distance determinations .