2026-10-13T02:37:28Z https://www.scidb.cn/oai

10.57760/sciencedb.space.03649 2026-06-15T10:07:40Z

2026-06-15 Design and Analysis of Close-Range Observation Strategies for Asteroid Kinetic-Impact Response Processes doi:10.57760/sciencedb.space.03649 en This paper presents a systematic analysis of close-range observation strategies for asteroid kinetic-impact response processes, focusing on the safety, observability, and engineering feasibility of a Close-Range Explorer (CRE). Using simulated ejecta distributions of a 35 m target asteroid as scenario inputs, two typical impact-response cases—cratering and fragmentation—are investigated. For the cratering scenario, the ejecta exhibit a clear cone-shaped distribution, and a hovering strategy outside the ejecta cone can satisfy the safety constraint while maintaining favorable observation geometry. For the fragmentation scenario, the ejecta show a highly irregular spatial distribution, making direct geometric safe-zone definitions ineffective. To provide a quantitative basis for avoidance design, an ejecta momentum-flux model based on annular integration is established, and a combined “pre-impact maneuver + trajectory optimization” strategy is proposed. Monte Carlo simulations considering release-position error, release-velocity error, maneuver magnitude error, maneuver direction error, and timing error show that the optimized strategy maintains strong safety robustness. The proposed framework provides a reference for trajectory design and safety assessment in close-range observation of asteroid kinetic-impact response processes. Near-Earth Asteroid; Planetary Defense; Kinetic Impact; Close-Range Observation; Trajectory Design Li Guohao Li Mingtao PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank