Table 2

Parameters (SI units) for the scaling law Qcrit = aR3μV2−3μ, where R is the target radius and V the impact velocity.

Scaling μ a

0.42 4.0e-4
Qreshape (10 Pa) 0.42 9.0e-7
Qreshape (100 Pa; nominal) 0.42 2.5e-6
Qreshape (1000 Pa) 0.42 3.8e-6
Qbil (nominal) 0.42 3.8e-6

Notes. The scaling for shape-changing impacts on 67P (Qreshape) and for impacts on generic bi-lobe shapes (Qbil) only hold for a fixed size (R = 1800 m).

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