Numerical simulation of high-velocity impact ejecta following falls of comets and asteroids onto the Moon

Details Numerical simulation of high-velocity impact ejecta following falls of comets and asteroids onto the Moon Numerical simulation of high-velocity impact ejecta following falls of comets and asteroids onto the Moon

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sosyr..42..329a&link_type=abstract

Solar System Research, Volume 42, Issue 4, pp.329-334

Statistics

Computation

9

96.20.Ka, 96.25.Pq, Impacts, Cratering, Impact Phenomena

Scientific paper

High-velocity comet and asteroid impacts onto the Moon are considered and the material masses ejected after such impacts at velocities above the second-cosmic velocity for the Moon (2.4 km/s) are calculated. Although the results depend on a projectile type and the velocity and angle of an impact, it has been demonstrated that, on average, the lunar mass decreases with time. The Moon has lost about 5 × 1018 kg, that is, about one-hundredth of a percent of its mass, over the last 3.8-3.9 billion years. The ejection of lunar meteorites and lunar dust, rich in 3He, is considered as well. The results of the study are compared to the results of earlier computations and data on lunar meteorites.

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