RESEARCH ARTICLE Meteoroids at the Moon: Orbital Properties, Surface 10.1029/2018JE005912 Vaporization, and Impact Ejecta Production Key Points: • Novel model characterizes the Petr Pokorný1,2,3 , Diego Janches2 , Menelaos Sarantos2, Jamey R. Szalay4 , direction, velocity, and arrival rates Mihály Horányi5,6 , David Nesvorný7 , and Marc J. Kuchner3 of meteoroids with latitude and local time at the Moon during 1 year 1Department of Physics, The Catholic University of America, Washington, USA, 2Heliophysics Science Division, NASA • Synthesis of Moon/Earth 3 measurements provides estimates Goddard Space Flight Center, Greenbelt, MD, USA, Astrophysics Science Division, NASA Goddard Space Flight for the lunar meteoroid mass influx, Center, Greenbelt, MD, USA, 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA, impact vaporization, and ejecta 5Department of Physics, University of Colorado Boulder, 392 UCB, Boulder, CO, USA, 6Laboratory for Atmospheric and production rate Space Physics, Boulder, CO, USA, 7Department of Space Studies, Southwest Research Institute, Boulder, CO, USA • Ejecta deposition rates of 30 cm/Myr and reasonable lunar impact vaporization rates result from this approach Abstract We use a dynamical model to characterize the monthly and yearly variations of the lunar meteoroid environment for meteoroids originating from short and long-period comets and the main-belt asteroids. Our results show that if we assume the meteoroid mass flux of 43.3 tons per day at Earth, inferred Correspondence to: P. Pokorny, from previous works, the mass flux of meteoroids impacting the Moon is 30 times smaller, approximately
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