Erik Asphaug

TL;DR: In this paper, the initial stage of crater formation on asteroid 243 Ida is examined, up to the cessation of fracture and the establishment of the cratering flow; at this stage we can infer final crater diameters but not profiles.

TL;DR: In this article, the authors describe the morphology and infer the geology of the largest impact features on Europa, which are probes into the crust of the world's largest icy bodies.

TL;DR: Three-dimensional simulations of Vesta’s global evolution under two overlapping planet-scale collisions closely reproduce its observed shape, and provide maps of impact excavation and ejecta deposition.

TL;DR: In this paper, the authors demonstrate that mutual gravitational interactions between an asteroid and a planet or another asteroid can play an important role in shaping an asteroid's spin state, and derive analytical descriptions of the effects and perform numerical simulations to explore the interactions and to give examples.

TL;DR: In this paper, the authors introduce the hypothesis that Saturn originally had a "galilean" system of moons comparable to Jupiter's, that collided and merged, ultimately forming Titan.