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nasa double asteroid redirection test (dart) trajectory validation and robustnessThe Double Asteroid Redirection Test (DART) mission will be the first to test the concept of a kinetic impactor. Several studies have been made on asteroid redirection and impact mitigation, however, to this date no mission tested the proposed concepts. An impact study on a representative body allows the measurement of the effects on the target's orbit and physical structure. With this goal, DART's objective is to verify the effectiveness of the kinetic impact concept for planetary defense. The spacecraft uses solar electric propulsion to escape Earth, flyby (138971) 2001 CB21 for impart rehearsal, and impact the secondary body of the (65803) Didymos system. This work focuses on the interplanetary trajectory design part of the mission with the validation of the baseline trajectory, performance comparison to other mission objectives, and assessment of the baseline robustness to missed thrust events. Results show a good performance of the selected trajectory for different mission objectives: latest possible escape date, maximum kinetic energy on impact, shortest possible time of flight, and use of an Earth swing-by. The baseline trajectory was shown to be robust to a missed thrust with 1% of fuel margin being enough to recover the mission for failures of more than 14 days.
Document ID
20170001428
Document Type
Conference Paper
Authors
Sarli, Bruno V.
(Catholic Univ. of America Washington, DC, United States)
Ozimek, Martin T.
(Johns Hopkins Univ. Baltimore, MD, United States)
Atchison, Justin A.
(Johns Hopkins Univ. Baltimore, MD, United States)
Englander, Jacob A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Barbee, Brent W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
February 8, 2017
Publication Date
February 5, 2017
Subject Category
Lunar and Planetary Science and Exploration
Astrodynamics
Report/Patent Number
GSFC-E-DAA-TN38510
Meeting Information
AAS/AIAA Space Flight Mechanics Meeting(San Antonio, TX)
Funding Number(s)
CONTRACT_GRANT: NNX16AL03G
CONTRACT_GRANT: NNN06AA01C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
design
optimization
trajectory

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