Shallow Encounters’ Impact on Asteroid Deflection Prediction and Implications on Trajectory Design
Analytical approximations are commonly employed in the initial trajectory design phase of a mission to rapidly explore a broad design space. In the context of an asteroid deflection mission, accurately predicting deflection is crucial to determining the spacecraft’s trajectory that will produce the...
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Veröffentlicht in: | Journal of guidance, control, and dynamics control, and dynamics, 2024-07, Vol.47 (7), p.1341-1358 |
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creator | Negri, Rodolfo B. Prado, Antônio F. B. A. |
description | Analytical approximations are commonly employed in the initial trajectory design phase of a mission to rapidly explore a broad design space. In the context of an asteroid deflection mission, accurately predicting deflection is crucial to determining the spacecraft’s trajectory that will produce the desired outcome. However, the dynamics involved are intricate, and simplistic models may not fully capture the system’s complexity. This study assesses the precision and limitations of analytical models in predicting deflection, comparing them to more accurate numerical simulations. The findings reveal that encounters with perturbing bodies, even at significant distances (a dozen times the radii of the sphere of influence of the perturbing planet), can markedly disturb the deflected asteroid’s trajectory, resulting in notable disparities between analytical and numerical predictions. The underlying reasons for this phenomenon are explained, and provisional general guidelines are provided to assist mission analysts in addressing such occurrences. By comprehending the impact of shallow encounters on deflection, this study equips designers with the knowledge to make informed decisions throughout the trajectory planning process, enhancing the efficiency and effectiveness of asteroid deflection missions. |
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B. A.</creator><creatorcontrib>Negri, Rodolfo B. ; Prado, Antônio F. B. A.</creatorcontrib><description>Analytical approximations are commonly employed in the initial trajectory design phase of a mission to rapidly explore a broad design space. In the context of an asteroid deflection mission, accurately predicting deflection is crucial to determining the spacecraft’s trajectory that will produce the desired outcome. However, the dynamics involved are intricate, and simplistic models may not fully capture the system’s complexity. This study assesses the precision and limitations of analytical models in predicting deflection, comparing them to more accurate numerical simulations. The findings reveal that encounters with perturbing bodies, even at significant distances (a dozen times the radii of the sphere of influence of the perturbing planet), can markedly disturb the deflected asteroid’s trajectory, resulting in notable disparities between analytical and numerical predictions. The underlying reasons for this phenomenon are explained, and provisional general guidelines are provided to assist mission analysts in addressing such occurrences. By comprehending the impact of shallow encounters on deflection, this study equips designers with the knowledge to make informed decisions throughout the trajectory planning process, enhancing the efficiency and effectiveness of asteroid deflection missions.</description><identifier>ISSN: 0731-5090</identifier><identifier>EISSN: 1533-3884</identifier><identifier>DOI: 10.2514/1.G007890</identifier><language>eng</language><publisher>Reston: American Institute of Aeronautics and Astronautics</publisher><subject>Asteroid deflection ; Asteroid missions ; Design ; Numerical prediction ; Trajectory analysis ; Trajectory planning</subject><ispartof>Journal of guidance, control, and dynamics, 2024-07, Vol.47 (7), p.1341-1358</ispartof><rights>Copyright © 2024 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at ; employ the ISSN to initiate your request. See also AIAA Rights and Permissions .</rights><rights>Copyright © 2024 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the ISSN 1533-3884 to initiate your request. 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By comprehending the impact of shallow encounters on deflection, this study equips designers with the knowledge to make informed decisions throughout the trajectory planning process, enhancing the efficiency and effectiveness of asteroid deflection missions.</description><subject>Asteroid deflection</subject><subject>Asteroid missions</subject><subject>Design</subject><subject>Numerical prediction</subject><subject>Trajectory analysis</subject><subject>Trajectory planning</subject><issn>0731-5090</issn><issn>1533-3884</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNplkM9KAzEQxoMoWKsH32BBEDxszZ9NkxxLrbVQULD3kN0kmrLd1GQX6c3X8PV8ErNswYOnmfn4fTPDB8A1ghNMUXGPJksIGRfwBIwQJSQnnBenYAQZQTmFAp6Dixi3ECIyRWwE9Ou7qmv_mS2ayndNa0L8-frOVru9qtrMN9ksJs07nT0YW5uqdUl7CUa7oVWN7uHaVaqfY2_ZBLVNpA-HZIrurbkEZ1bV0Vwd6xhsHheb-VO-fl6u5rN1rhDjbU4sKwvEaInTt4UmuCQQY60YnlqlhWConFKkK8KMItRQrYkVllPOedIKMgY3w9p98B-dia3c-i406aIkkGEIuShEou4Gqgo-xmCs3Ae3U-EgEZR9hhLJY4aJvR1Y5ZT62_Yf_AVDhXAt</recordid><startdate>202407</startdate><enddate>202407</enddate><creator>Negri, Rodolfo B.</creator><creator>Prado, Antônio F. 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subjects | Asteroid deflection Asteroid missions Design Numerical prediction Trajectory analysis Trajectory planning |
title | Shallow Encounters’ Impact on Asteroid Deflection Prediction and Implications on Trajectory Design |
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