Calculating the momentum enhancement factor for asteroid deflection studies

Heberling, Tamra; Gisler, Galen; Plesko, Catherine; Weaver, Robert

doi:10.1016/j.proeng.2017.09.764

Title: Calculating the momentum enhancement factor for asteroid deflection studies

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Abstract

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:

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

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

Publication Date:: Tue Oct 17 00:00:00 EDT 2017

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1406222

Report Number(s):: LA-UR-17-23935
Journal ID: ISSN 1877-7058; TRN: US1703033

Grant/Contract Number:: AC52-06NA25396

Resource 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

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; momentum enhancement; beta; eulerian hydrocode; simulation; convergence

Citation Formats


                    Heberling, Tamra, Gisler, Galen, Plesko, Catherine, and Weaver, Robert. Calculating the momentum enhancement factor for asteroid deflection studies.  United States: N. p., 2017. 
Web.  doi:10.1016/j.proeng.2017.09.764.

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                    Heberling, Tamra, Gisler, Galen, Plesko, Catherine, & Weaver, Robert. Calculating the momentum enhancement factor for asteroid deflection studies.  United States.  https://doi.org/10.1016/j.proeng.2017.09.764

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                    Heberling, Tamra, Gisler, Galen, Plesko, Catherine, and Weaver, Robert. Tue .  
"Calculating the momentum enhancement factor for asteroid deflection studies".  United States.  https://doi.org/10.1016/j.proeng.2017.09.764.  https://www.osti.gov/servlets/purl/1406222.

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@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         = {Tue Oct 17 00:00:00 EDT 2017},

  month        = {Tue Oct 17 00:00:00 EDT 2017}

}

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