Extended Data Fig. 1: Further basin outline choices and best-fit tapered ellipses.
From: Southward impact excavated magma ocean at the lunar South Pole–Aitken basin
a–h, Panels show two further outline tracings based on Bouguer gravity and gravity gradients for the SPA basin (a,b, corresponding to fits 2 and 3 in Extended Data Table 1), an extra outline tracing for the SPA basin based on topography (c, fit z, 2 in Extended Data Table 1), analyses of the Hellas (d), Crisium (e), Utopia (f) and Smythii (h) basins in Bouguer gravity and an analysis of the Smythii basin in topography (g). All panels are in basin-centred polar projections with the inferred downrange direction to the bottom.
