Córdoba Astronomical Observatory has began a site testing program in argentine scientific stations at Antartica. Measurements in order to estimate sky quality were made during the 1989 polar night at the Belgrano II Station, which offered the best conditions according to its geographical position (Nunatak Vertrab: Lat -77°52'16"; Long 34°37'08"W) and meteorological conditions. In this paper results are presented and discussed.