A basin-free spherical shape as an outcome of a giant impact on asteroid Hygiea

  title={A basin-free spherical shape as an outcome of a giant impact on asteroid Hygiea},
  author={Pierre Vernazza and L. Jord{\'a} and Pavel {\vS}eve{\vc}ek and Miroslav Bro{\vz} and M. Viikinkoski and Josef Hanu{\vs} and Beno{\^i}t Carry and Alexis Drouard and Marin Ferrais and Micha{\"e}l Marsset and F. Marchis and Mirel Birlan and Edyta Podlewska-Gaca and Emmanuel Jehin and Przemysław Bartczak and Grzegorz Dudziński and J{\'e}r{\^o}me Berthier and Julie C. Castillo‐Rogez and Fabrice Cipriani and Florent Colas and Francesca E. DeMeo and Christophe Dumas and Josef Ďurech and Romain F{\'e}tick and Thierry Fusco and J. Grice and Marika Kaasalainen and Agnieszka Kryszczyńska and Philippe Lamy and H. Le Coroller and Anna Marciniak and Tadeusz Michałowski and P. Michel and N. Rambaux and T Santana-Ros and P. Tanga and Fr{\'e}d{\'e}ric Vachier and Arthur Vigan and Olivier G. Witasse and B. Yang and Micha{\"e}l Gillon and Zouhair Benkhaldoun and R{\'o}bert Szak{\'a}ts and R. Hirsch and Ren{\'e} Duffard and A. Chapman and J. L. Maestre},
  journal={Nature Astronomy},
(10) Hygiea is the fourth largest main belt asteroid and the only known asteroid whose surface composition appears similar to that of the dwarf planet (1) Ceres 1 , 2 , suggesting a similar origin for these two objects. Hygiea suffered a giant impact more than 2 Gyr ago 3 that is at the origin of one of the largest asteroid families. However, Hygeia has never been observed with sufficiently high resolution to resolve the details of its surface or to constrain its size and shape. Here, we report… 
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