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  • Presentation | NH23B: Latest Developments in Planetary Defense I Poster
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  • NH23B-0475: Modeling Atmospheric Breakup and Energy Deposition of Incoming Bolides
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  • Board 0475‚ Hall EFG (Poster Hall)
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Author(s):
Evan Bjonnes, Lawrence Livermore National Laboratory (First Author, Presenting Author)
Jason Pearl, Lawrence Livermore National Laboratory
Kathryn Kumamoto, Lawrence Livermore National Laboratory
J. Michael Owen, Lawrence Livermore National Laboratory


Asteroids incoming to Earth's atmosphere pose a threat the surface infrastructure and life through the possibility of ground impact as well as the atmospheric shockwave that develops as it travels through the atmosphere. This work simulates the effect on the atmosphere for the case of 4 different asteroid sizes (77-278 m diameter) with 3 different entry angles (20°, 45°, and 90°). We additionally simulate the effects of asteroids which are a coherent piece of rock compared to a hydrodynamic body akin to a rubble pile asteroid. We find strong correlations between altitude and both entry angle and asteroid size, where smaller asteroids or asteroids on shallower trajectories disintegrate higher in the atmosphere.



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