The structure of the asteroid 4 Vesta as revealed by models of planet-scale collisions

Asteroid 4 Vesta seems to be a major intact protoplanet, with a surface composition similar to that of the HED (howardite–eucrite–diogenite) meteorites. The southern hemisphere is dominated by a giant impact scar, but previous impact models have failed to reproduce the observed topography. The recent discovery that Vesta’s southern hemisphere is dominated… CONTINUE READING