Contours of regions in ecliptic coordinates of ISMF orientations where the MHD model reproduces the TS crossing for V2 on 2007 August 30 for ISMF strengths equal to (blue) 1.8, (green) 2.0, (orange) 2.2, (red) 2.4, and (yellow) 3 μG (contours are shown from right to left in increasing strength). For the IBEX ribbon, the small black contour shows |B·R| < 0.025 obtained for 2.2   μG as the best fit. We note that the B·R = 0 condition is not sensitive to the ISMF strength and only the best solution is shown. (This figure is available in color in the electronic form.)