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Table 5

Satellite impact rates and related quantities.

System Satellite Unit PS/PP 10−5 Ni/Ntot 10−6 PS 10−8 υS km s−1 Ċs Gyr−1 Dcr km ĊD>10 10−6 km−2 Gyr−1
Jovian Io 13.5 2.85 44.4 32.0 160 8.3 2.5
Europa 5.98 1.26 19.7 24.9 71.0 16.1 3.4
Ganymede 11.6 2.45 38.2 20.4 138 14.4 2.1
Callisto 5.90 1.24 19.4 15.4 70 12.6 1.2
Saturnian Mimas 0.58 0.11 0.63 23.2 2.26 26.6 10
Enceladus 0.56 0.10 0.60 21.7 2.17 22.3 5.0
Tethys 1.82 0.33 1.97 21.0 7.11 20.4 3.5
Dione 2.72 0.50 2.96 18.8 10.6 17.1 4.1
Rhea 2.45 0.45 2.66 15.1 9.58 14.8 1.8
Titan 14.2 2.60 15.4 10.8 55.4 10.9 0.7
Uranian Miranda 2.77 0.44 1.46 12.4 5.25 18.2 12
Ariel 10.5 1.63 5.47 10.2 19.7 12.0 5.4
Umbriel 7.99 1.26 4.21 8.7 15.2 11.2 4.0
Titania 9.38 1.48 4.94 7.0 17.8 9.6 2.1
Oberon 6.34 1.00 3.34 6.1 12.0 9.0 1.3

Notes. The impact probability of planetesimals with the satellites. The first two columns are the impact probability scaled to that of the planet and the fraction of impacts in the flyby simulations, respectively. The third column lists the absolute impact probability of a planetesimal with a satellite during the last 3.5 Gyr of the dynamical simulations. The fourth column lists the average impact speed of a planetesimal with a satellite. The fifth column lists the impact rate of planetesimals with diameter Di > 1 km in units of Gyr−1. The penultimate column is the crater diameter excavated for an impactor with diameter Di = 1 km. The last column list the cratering rate for craters with diameter Dcr > 10 km.

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