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Physical Analysis of Bennu Samples Reveals Regolith Production by Collisional Disruption on Near-Earth Asteroids

  • Authors: R.-L. Ballouz, A. J. Ryan, R. J. Macke, O. S. Barnouin, M. Lê, J. Moreno, S. Eckley, L. Hanton, A. Hildebrand, V. Toy-Edens, R. M. Meier, M. Berkson, E. Asphaug, S. Cambioni, C. G. Hoover, K. Jardine, E.R. Jawin, N. Lunning, J. L. Molaro, M. Pajola, K. Righter, K. T. Ramesh, F. Tusberti, K. J. Walsh, C. W. V. Wolner, D. N. DellaGiustina, H. C. Connolly, D. S. Lauretta

R.-L. Ballouz et al 2026 The Planetary Science Journal 7 .

  • Provider: AAS Journals

Caption: Figure 20.

Dynamics of a 40 m diameter (black) and a 4 m diameter (cyan) fragment penetrating into Bennu regolith at 2.0 m s−1 (dotted curves) and 0.3 m s−1 (solid curves). Top: nondimensional depth, z/D, where z is the fragment position from the surface and D is the fragment diameter, as a function of nondimensional time, t. Bottom: evolution of fragment velocity, Uf, normalized by Bennu’s escape speed, vesc.

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