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The threshold at which a meteor shower becomes hazardous to spacecraft
Althea V. Moorhead, William J. Cooke, Peter G. Brown +1
Although the risk posed to spacecraft due to meteoroid impacts is dominated by sporadic meteoroids, meteor showers can raise this risk for short periods of time. NASA's Meteoroid E…
A library of meteoroid environments encountered by spacecraft in the inner solar system
Althea V. Moorhead, Katie Milbrandt, Aaron Kingery
NASA's Meteoroid Engineering Model (MEM) is designed to provide aerospace engineers with an accurate description of potentially hazardous meteoroids. It accepts a spacecraft trajec…
A reference meteor magnitude for intercomparable fluxes
Althea V. Moorhead, Denis Vida, Peter G. Brown +1
The rate at which meteors pass through Earth's atmosphere has been measured or estimated many times over; existing flux measurements span at least 12 astronomical magnitudes, or ro…
How long-lived grains dominate the shape of the Zodiacal Cloud
Petr Pokorny, Althea V. Moorhead, Marc J. Kuchner +2
Grain-grain collisions shape the 3-dimensional size and velocity distribution of the inner Zodiacal Cloud and the impact rates of dust on inner planets, yet they remain the least u…