Fragment shapes in impact experiments ranging from cratering to catastrophic disruption
- Michikami, Tatsuhiro
- Hagermann, Axel
- Kadokawa, Tokiyuki
- Yoshida, Akifumi
- Shimada, Akira
- Hasegawa, Sunao
- Tsuchiyama, Akira
DOIAbstract
AbstractLaboratory impact experiments have found that impact fragments tend to be elongated. Their shapes, as defined by axes a, b and c, these being the maximum dimensions of the fragment in three mutually orthogonal planes (a⩾b⩾c), are distributed around mean values of the axial ratios b/a∼0.7 and c/a∼0.5. This corresponds to a:b:c in the simple proportion 2:√2:1. The shape distributions of some boulders on Asteroid Eros, the small- and fast-rotating asteroids (diameter <200m and rotation period <1h), and asteroids in young families, are similar to those of laboratory fragments created in catastrophic disruptions. Catastrophic disruption is, however, a process that is different from impact cratering. In order to systematically investigate...
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