Impact excavation on Asteroid 4 Vesta: Hubble Space Telescope results

  title={Impact excavation on Asteroid 4 Vesta: Hubble Space Telescope results},
  author={P. Thomas and R. Binzel and M. Gaffey and A. Storrs and E. Wells and B. Zellner},
Hubble Space Telescope images of asteroid 4 Vesta obtained during the favorable 1996 apparition show an impact crater 460 kilometers in diameter near the south pole. Color measurements within the 13-kilometer-deep crater are consistent with excavation deep into a high-calcium pyroxene-rich crust or olivine upper mantle. About 1 percent of Vesta was excavated by the crater formation event, a volume sufficient to account for the family of small Vesta-like asteroids that extends to dynamical… Expand

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