Comparison of our calculated semi-major axes (X axis) with published catalog data (Y axis). The orange upper-left number in each subplot is the median deviation between the respective catalog and measured values. The orange line marks the ideal linear correlation, this function having a slope of one and intercept equal to the median deviation value. For the LV galaxies with crowded surroundings, we note higher catalog values due to the unremoved surrounding objects. For the Virgo galaxies a_T, we observe that the literature data have not been sufficiently deep to detect outer regions of the galaxies.