Crater population on asteroid (101955) Bennu indicates impact armouring and a young surface - Nature Geoscience

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Crater population on asteroid (101955) Bennu indicates impact armouring and a young surface - Nature Geoscience
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NASA spacecraft observes asteroid Bennu's boulder 'body armor' NASAGoddard NatureGeosci

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.A 141-m-diameter crater on Bennu, centered at 55.7°N and 62.7°E. White arrows in both frames indicate the crater location., The shape model only, colorized by facet radius. The images collected during the spacecraft’s final approach , in conjunction with the shape model, were used to identify and measure large craters on Bennu.

Extended Data Fig. 3 A flow chart of our process for generating simulated crater populations for a given modeled age, and definition of the diameter bins used to calculate fits between the observed and modeled crater populations.

Extended Data Fig. 4 Comparison between observed and modeled crater populations for Bennu’s craters and an NEA flux., residuals for all combinations of bin sets and modeled ages for small craters. The residuals are in the same form as the differential SFD, which is N/, where N is the number of craters in diameter range dD, and A is the surface area used for normalization, so are in units of #/. There is a consistent minimum across all bin sets.

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