首页 > 《力学学报：英文版》 > 2013年1期 > Near-Earth asteroid flyby trajectories from the Sun-Earth L2 for Chang＇e-2＇s extended flight

Near-Earth asteroid flyby trajectories from the Sun-Earth L2 for Chang＇e-2＇s extended flight

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摘要 DrivenbycuriosityaboutpossibleflightoptionsfortheChang’e-2spacecraftafteritremainsattheSun-EarthL2point,effectiveapproachesweredevelopedfordesigningpreliminaryfuel-optimalnear-Earthasteroidflybytrajectories.Theapproachesincludetheuseofmodifiedunstablemanifolds,gridsearchofthemanifolds’parameters,andatwo-impulsemaneuverfororbitalphasematchingandz-axisbiaschange,andaredemonstratedtobeeffectiveinasteroidtargetscreeningandtrajectoryoptimization.Asteroidflybysareexpectedtobewithinadistanceof2×107kmfromtheEarthowingtotheconstrainedEarth-spacecraftcommunicationrange.Inthiscase,thespacecraft’sorbitalmotionissignificantlyaffectedbythegravitiesofboththeSunandtheEarth,andtherefore,theconceptofthe"heliocentricoscillating-Keplerorbit"isproposed,becausetheclassicalorbitalelementsoftheflybytrajectoriesreferencedintheheliocentricinertialframeoscillatesignificantlywithrespecttotime.Theanalysisandresultspresentedinthisstudyshowthat,amongtheasteroidswhoseorbitsarethemostaccuratelypredicted,"Toutatis","2005NZ6",or"2010CL19"mightbeencounteredbyChang’e-2inlate2012or2013withtotalimpulseslessthan100m/s.

DOI odwqnovgdk/1215456

作者 Yang Gao

机构地区不详

出处《力学学报：英文版》 2013年1期

关键词近地小行星飞行轨迹地球太阳轨道运动不稳定流形

分类 [理学][力学]

出版日期 2013年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）