One of the SPH simulations from Brož et al. (2022a), showing a medium-energy impact to a differentiated body, which created an elongated iron core. The time 10 000 s corresponds to the end of fragmentation phase. The density is indicated by the colour scale. The oblateness J₂ = −C₂₀ is higher (not lower) than for a homogeneous body. This could correspond to our long-arc, astrometric model with three precession cycles.