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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 7.

(a) Impact chamber and diagnostics setup at the Hopkins Extreme Materials Institute’s HyFIRE facility. (b) A target suspended with fishing wire. Panels (c)–(e) show example images from experiment CI_LG_HyFire_004, one of three head-on impact experiments at ∼5.3 km s−1. (c) The target right before impact (0.001 ms after firing). The projectile is the white streak on the right. (d) Approximately 0.64 ms after impact, the target begins to fracture. (e) Approximately 2.3 ms after impact, the target is fully disrupted. The largest post-impact fragment from this impact is 4.4% of the mass of the target.

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