Momentum transfer from the DART mission kinetic impact on asteroid Dimorphos

Author:

Cheng Andrew F.ORCID,Agrusa Harrison F.ORCID,Barbee Brent W.ORCID,Meyer Alex J.,Farnham Tony L.ORCID,Raducan Sabina D.ORCID,Richardson Derek C.ORCID,Dotto Elisabetta,Zinzi Angelo,Della Corte Vincenzo,Statler Thomas S.ORCID,Chesley StevenORCID,Naidu Shantanu P.ORCID,Hirabayashi MasatoshiORCID,Li Jian-YangORCID,Eggl SiegfriedORCID,Barnouin Olivier S.ORCID,Chabot Nancy L.ORCID,Chocron SidneyORCID,Collins Gareth S.ORCID,Daly R. TerikORCID,Davison Thomas M.ORCID,DeCoster Mallory E.ORCID,Ernst Carolyn M.,Ferrari FabioORCID,Graninger Dawn M.ORCID,Jacobson Seth A.ORCID,Jutzi Martin,Kumamoto Kathryn M.ORCID,Luther RobertORCID,Lyzhoft Joshua R.ORCID,Michel PatrickORCID,Murdoch Naomi,Nakano RyotaORCID,Palmer EricORCID,Rivkin Andrew S.ORCID,Scheeres Daniel J.ORCID,Stickle Angela M.,Sunshine Jessica M.,Trigo-Rodriguez Josep M.ORCID,Vincent Jean-Baptiste,Walker James D.ORCID,Wünnemann KaiORCID,Zhang YunORCID,Amoroso Marilena,Bertini IvanoORCID,Brucato John R.ORCID,Capannolo Andrea,Cremonese GabrieleORCID,Dall’Ora Massimo,Deshapriya Prasanna J. D.,Gai Igor,Hasselmann Pedro H.,Ieva SimoneORCID,Impresario GabrieleORCID,Ivanovski Stavro L.,Lavagna Michèle,Lucchetti AliceORCID,Epifani Elena M.,Modenini Dario,Pajola MaurizioORCID,Palumbo Pasquale,Perna DavideORCID,Pirrotta Simone,Poggiali GiovanniORCID,Rossi AlessandroORCID,Tortora PaoloORCID,Zannoni MarcoORCID,Zanotti GiovanniORCID

Abstract

AbstractThe NASA Double Asteroid Redirection Test (DART) mission performed a kinetic impact on asteroid Dimorphos, the satellite of the binary asteroid (65803) Didymos, at 23:14 UTC on 26 September 2022 as a planetary defence test1. DART was the first hypervelocity impact experiment on an asteroid at size and velocity scales relevant to planetary defence, intended to validate kinetic impact as a means of asteroid deflection. Here we report a determination of the momentum transferred to an asteroid by kinetic impact. On the basis of the change in the binary orbit period2, we find an instantaneous reduction in Dimorphos’s along-track orbital velocity component of 2.70 ± 0.10 mm s−1, indicating enhanced momentum transfer due to recoil from ejecta streams produced by the impact3,4. For a Dimorphos bulk density range of 1,500 to 3,300 kg m−3, we find that the expected value of the momentum enhancement factor, β, ranges between 2.2 and 4.9, depending on the mass of Dimorphos. If Dimorphos and Didymos are assumed to have equal densities of 2,400 kg m−3, $${\beta =3.61}_{-0.25}^{+0.19}(1\sigma )$$ β = 3.61 0.25 + 0.19 ( 1 σ ) . These β values indicate that substantially more momentum was transferred to Dimorphos from the escaping impact ejecta than was incident with DART. Therefore, the DART kinetic impact was highly effective in deflecting the asteroid Dimorphos.

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

Cited by 33 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3