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Title: Calculating the momentum enhancement factor for asteroid deflection studies

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.
Authors:
 [1] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-23935
Journal ID: ISSN 1877-7058; TRN: US1703033
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Procedia Engineering
Additional Journal Information:
Journal Volume: 204; Journal Issue: C; Conference: Hypervelocity Impact Symposium, Canterbury (United Kingdom), 24-28 Apr 2017; Journal ID: ISSN 1877-7058
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; momentum enhancement; beta; eulerian hydrocode; simulation; convergence
OSTI Identifier:
1406222

Heberling, Tamra, Gisler, Galen, Plesko, Catherine, and Weaver, Robert. Calculating the momentum enhancement factor for asteroid deflection studies. United States: N. p., Web. doi:10.1016/j.proeng.2017.09.764.
Heberling, Tamra, Gisler, Galen, Plesko, Catherine, & Weaver, Robert. Calculating the momentum enhancement factor for asteroid deflection studies. United States. doi:10.1016/j.proeng.2017.09.764.
Heberling, Tamra, Gisler, Galen, Plesko, Catherine, and Weaver, Robert. 2017. "Calculating the momentum enhancement factor for asteroid deflection studies". United States. doi:10.1016/j.proeng.2017.09.764. https://www.osti.gov/servlets/purl/1406222.
@article{osti_1406222,
title = {Calculating the momentum enhancement factor for asteroid deflection studies},
author = {Heberling, Tamra and Gisler, Galen and Plesko, Catherine and Weaver, Robert},
abstractNote = {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.},
doi = {10.1016/j.proeng.2017.09.764},
journal = {Procedia Engineering},
number = C,
volume = 204,
place = {United States},
year = {2017},
month = {10}
}