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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) meteorites1,2,3,4. The southern hemisphere is dominated by a giant impact scar5, but previous impact models6,7,8 have failed to reproduce the observed topography. The recent discovery that Vesta’s southern hemisphere is dominated by two overlapping basins9 provides an opportunity to model Vesta’s topography more accurately. Here we report three-dimensional simulations of Vesta’s global evolution under two overlapping planet-scale collisions. We closely reproduce its observed shape, and provide maps of impact excavation and ejecta deposition. Spiral patterns observed in the younger basin Rheasilvia9, about one billion years old10, are attributed to Coriolis forces during crater collapse. Surface materials exposed in the north come from a depth of about 20 kilometres, according to our models, whereas materials exposed inside the southern double-excavation come from depths of about 60–100 kilometres. If Vesta began as a layered, completely differentiated protoplanet, then our model predicts large areas of pure diogenites and olivine-rich rocks. These are not seen11,12,13, possibly implying that the outer 100 kilometres or so of Vesta is composed mainly of a basaltic crust (eucrites) with ultramafic intrusions (diogenites).

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Figure 1: SPH simulation of the formation of the two giant impact features in Vesta’s southern hemisphere.
Figure 2: Velocity field lines in snapshots of the simulation of the Rheasilvia impact.
Figure 3: Initial provenance (km depth) of the ejecta and the exposed material on the surface.
Figure 4: Vesta interior models and the corresponding petrological/mineralogical maps.


  1. McCord, T. B., Adams, J. B. & Johnson, T. V. Asteroid Vesta: spectral reflectivity and compositional implications. Science 168, 1445–1447 (1970)

    Article  ADS  CAS  Google Scholar 

  2. McCord, T. B. et al. Dark material on Vesta from the infall of carbonaceous volatile-rich material. Nature 491, 83–86 (2012)

    Article  ADS  CAS  Google Scholar 

  3. Keil, K. in Asteroids III (eds Bottke, W. F. Jr et al.) 573–584 (Univ. Arizona Press, 2002)

    Google Scholar 

  4. Russell, C. T. et al. Dawn at Vesta: testing the protoplanetary paradigm. Science 336, 684–686 (2012)

    Article  ADS  CAS  Google Scholar 

  5. Thomas, P. C. et al. Impact excavation on asteroid 4 Vesta: Hubble Space Telescope results. Science 277, 1492–1495 (1997)

    Article  ADS  CAS  Google Scholar 

  6. Asphaug, E. Impact origin of the Vesta family. Meteorit. Planet. Sci. 32, 965–980 (1997)

    Article  ADS  CAS  Google Scholar 

  7. Jutzi, M. & Asphaug, E. Mega-ejecta on asteroid Vesta. Geophys. Res. Lett.. 38, L01102, (2011)

    Article  ADS  Google Scholar 

  8. Ivanov, B. A., Melosh, H. J. & Pierazzo, E. The south pole impact crater on Vesta: numerical modelling. Lunar Planet Sci Conf. 42, 1717 (2011); available at

    ADS  Google Scholar 

  9. Schenk, P. et al. The geologically recent giant impact basins at Vesta’s south pole. Science 336, 694–697 (2012)

    Article  ADS  CAS  Google Scholar 

  10. Marchi, S. et al. The violent collisional history of asteroid 4 Vesta. Science 336, 690–694 (2012)

    Article  ADS  CAS  Google Scholar 

  11. McSween, H. Y. et al. Dawn’s exploration of Vesta’s south pole basin — where is the mantle? 75th Annual Meteoritical Society Meeting (2012); available at

  12. De Sanctis, M. C. et al. Spectroscopic characterization of mineralogy and its diversity across Vesta. Science 336, 697–700 (2012)

    Article  ADS  CAS  Google Scholar 

  13. Reddy, V. et al. Color and albedo heterogeneity of Vesta from Dawn. Science 336, 700–704 (2012)

    Article  ADS  CAS  Google Scholar 

  14. Jaumann, R. et al. Vesta’s shape and morphology. Science 336, 687–690 (2012)

    Article  ADS  CAS  Google Scholar 

  15. Housen, K. R., Schmidt, R. M. & Holsapple, K. A. Crater ejecta scaling laws: fundamental forms based on dimensional analysis. J. Geophys. Res. 88, 2485–2499 (1983)

    Article  ADS  Google Scholar 

  16. Benz, W. & Asphaug, E. Simulations of brittle solids using smooth particle hydrodynamics. Comput. Phys. Commun. 87, 253–265 (1995)

    Article  ADS  CAS  Google Scholar 

  17. Jutzi, M., Benz, W. & Michel, P. Numerical simulations of impacts involving porous bodies. I. Implementing sub-resolution porosity in a 3D SPH hydrocode. Icarus 198, 242–255 (2008)

    Article  ADS  Google Scholar 

  18. Ivanov, B. A. & Melosh, H. J. The Rheasilvia crater on Vesta: numerical modelling. Lunar Planet. Sci. Conf. 43, 2148 (2012); available at

    ADS  Google Scholar 

  19. Preusker, F. et al. Topography of Vesta from Dawn FC stereo images. Lunar Planet. Sci. Conf. 43, 2012 (2012); available at

    ADS  Google Scholar 

  20. Takeda, H. A layered-crust model of a howardite parent body. Icarus 40, 455–470 (1979)

    Article  ADS  CAS  Google Scholar 

  21. Ruzicka, A., Snyder, G. A. & Taylor, L. Vesta as the HED parent body: implications for the size of a core and for large-scale differentiation. Meteorit. Planet. Sci. 32, 825–840 (1997)

    Article  ADS  CAS  Google Scholar 

  22. Righter, K. & Drake, M. J. A magma ocean on Vesta: core formation and petrogenesis of eucrites and diogenites. Meteorit. Planet. Sci. 32, 929–944 (1997)

    Article  ADS  CAS  Google Scholar 

  23. Mittlefehldt, D. W. Petrology and geochemistry of the Elephant Moraine A79002 diogenite: a genomict breccia containing a magnesian harzburgite component. Meteorit. Planet. Sci. 35, 901–912 (2000)

    Article  ADS  CAS  Google Scholar 

  24. Barrat, J.-A., Yamaguchi, A., Zanda, B., Bollinger, C. & Bohn, M. Relative chronology of crust formation on asteroid Vesta: insights from the geochemistry of diogenites. Geochim. Cosmochim. Acta 74, 6218–6231 (2010)

    Article  ADS  CAS  Google Scholar 

  25. Yamaguchi, A., Barrat, J.-A., Ito, M. & Bohn, M. Posteucritic magmatism on Vesta: Evidence from the petrology and thermal history of diogenites. J. Geophys. Res.. 116, E08009, (2011)

    ADS  Google Scholar 

  26. Prettyman, T. H. et al. Elemental mapping by Dawn reveals exogenic H in Vesta’s regolith. Science 338, 242–246 (2012) (published online, 20 September 2012)

    Article  ADS  CAS  Google Scholar 

  27. Beck, P. et al. NIR spectral trends of HED meteorites: can we discriminate between the magmatic evolution, mechanical mixing and observation geochemistry effects? Icarus 216, 560–571 (2011)

    Article  ADS  CAS  Google Scholar 

  28. Collins, G. S., Melosh, H. J. & Ivanov, B. A. Modeling damage and deformation in impact simulations. Meteorit. Planet. Sci. 39, 217–231 (2004)

    Article  ADS  CAS  Google Scholar 

  29. Melosh, H. J. & Ivanov, B. A. Impact crater collapse. Annu. Rev. Earth Planet. Sci. 27, 385–415 (1999)

    Article  ADS  CAS  Google Scholar 

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M.J. acknowledges support from the Ambizione programme of the Swiss National Science Foundation. E.A. was supported by NASA’s Planetary Geology and Geophysics Program. J.-A.B. acknowledges support from the Programme National de Planétologie de l’INSU. W.B. acknowledges support from the Swiss National Science Foundation.

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Authors and Affiliations



M.J. performed and analysed the numerical simulations and led the research. E.A. and W.B. helped to design the numerical study and its scientific formulation. P.G. and J-A. B. provided the Vesta interior models. P.G. and W.B. initiated the collaboration between the four institutions. All authors contributed to interpretation of the results and preparation of the manuscript.

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Correspondence to M. Jutzi.

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The authors declare no competing financial interests.

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Jutzi, M., Asphaug, E., Gillet, P. et al. The structure of the asteroid 4 Vesta as revealed by models of planet-scale collisions. Nature 494, 207–210 (2013).

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