English: South pole Aitken basin on the moon, from JAXA's Kaguya data. Viewed at -45 degrees. The black ring is an old approximation; the elliptical purple and grey rings trace the inner and outer rings per [1] (fig. 2 from Garrick-Bethell and Zuber, 2009, doi:10.1016/j.icarus.2009.05.032)