Improved asteroid deflection model runs faster, reveals more doomsday worries

Researchers at Sandia National Laboratories have developed a faster and more detailed asteroid deflection modeling system. Their simulations showcase the complexities of asteroid shape and orientation in deflection efforts. Previously, calculations were time-consuming, limiting the ability to explore different scenarios or mission concepts.

Sandia staff physicist Nathan Moore and his team addressed this issue by combining two existing simulation codes, ALEGRA and SPARTA. ALEGRA excels at simulating radiation heating and high-energy material dynamics, while SPARTA handles low-density gases effectively. By using both codes, the team reduced computational burden while maintaining accuracy in predicting deflection for irregularly shaped asteroids.

The improved models reveal that asteroid shape and orientation significantly impact deflection outcomes, with X-ray irradiation producing velocity changes ranging from fivefold to nearly twofold depending on the asteroid's side exposed to the blast. This emphasizes the need for precise detonation placement and raises concerns about limited knowledge of incoming asteroids' composition, orientation, and internal structure.