Results of our analysis to determine the nebula center for different choices of RHT parameters. The upper panels show the integrated RHT intensity for every pixel in red overlaid over the [S II] image, while the lower panels show the resulting posteriors for the coordinates of the nebula center. The upper and lower rows show the results for r_s = 2″ and 2﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩4 respectively, while the columns, from left to right, are for D_w = 12″, 13″, 15″, and 17″, respectively.