Calculating the momentum enhancement factor for asteroid deflection studies

Journal Article · Tue Oct 17 00:00:00 EDT 2017 · Procedia Engineering

DOI:https://doi.org/10.1016/j.proeng.2017.09.764· OSTI ID:1406222

Heberling, Tamra ^[1]; Gisler, Galen ^[1]; Plesko, Catherine ^[1]; Weaver, Robert ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The possibility of kinetic-impact deflection of threatening near-Earth asteroids will be tested for the first time in the proposed AIDA (Asteroid Impact Deflection Assessment) mission, involving NASAs DART (Double Asteroid Redirection Test). The impact of the DART spacecraft onto the secondary of the binary asteroid 65803 Didymos at a speed of 5 to 7 km/s is expected to alter the mutual orbit by an observable amount. Furthermore, the velocity transferred to the secondary depends largely on the momentum enhancement factor, typically referred to as beta. Here, we use two hydrocodes developed at Los Alamos, RAGE and PAGOSA, to calculate an approximate value for beta in laboratory-scale benchmark experiments. Convergence studies comparing the two codes show the importance of mesh size in estimating this crucial parameter.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1406222
• Report Number(s): LA-UR-17-23935; TRN: US1703033
• Journal Information: Procedia Engineering, Vol. 204, Issue C; Conference: Hypervelocity Impact Symposium, Canterbury (United Kingdom), 24-28 Apr 2017; ISSN 1877-7058
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
momentum enhancement
beta
eulerian hydrocode
simulation
convergence