Imperial College London
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Professor Gareth Collins

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Planetary Science
 
 
 
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Contact

 

+44 (0)20 7594 1518g.collins Website

 
 
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Location

 

4.83Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cheng:2023:10.1038/s41586-023-05878-z,
author = {Cheng, AF and Agrusa, HF and Barbee, BW and Meyer, AJ and Farnham, TL and Raducan, SD and Richardson, DC and Dotto, E and Zinzi, A and Della, Corte V and Statler, TS and Chesley, S and Naidu, SP and Hirabayashi, M and Li, J-Y and Eggl, S and Barnouin, OS and Chabot, NL and Chocron, S and Collins, GS and Daly, RT and Davison, TM and DeCoster, ME and Ernst, CM and Ferrari, F and Graninger, DM and Jacobson, SA and Jutzi, M and Kumamoto, KM and Luther, R and Lyzhoft, JR and Michel, P and Murdoch, N and Nakano, R and Palmer, E and Rivkin, AS and Scheeres, DJ and Stickle, AM and Sunshine, JM and Trigo-Rodriguez, JM and Vincent, J-B and Walker, JD and Wünnemann, K and Zhang, Y and Amoroso, M and Bertini, I and Brucato, JR and Capannolo, A and Cremonese, G and Dall'Ora, M and Deshapriya, PJD and Gai, I and Hasselmann, PH and Ieva, S and Impresario, G and Ivanovski, SL and Lavagna, M and Lucchetti, A and Epifani, EM and Modenini, D and Pajola, M and Palumbo, P and Perna, D and Pirrotta, S and P},
doi = {10.1038/s41586-023-05878-z},
journal = {Nature},
pages = {457--460},
title = {Momentum transfer from the DART mission kinetic impact on asteroid dimorphos},
url = {http://dx.doi.org/10.1038/s41586-023-05878-z},
volume = {616},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The 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 September 26, 2022 as a planetary defense test1. DART was the first hypervelocity impact experiment on an asteroid at size and velocity scales relevant to planetary defense, intended to validate kinetic impact as a means of asteroid deflection. Here we report the first determination of the momentum transferred to an asteroid by kinetic impact. Based on 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, [Formula: see text], 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, [Formula: see text]. These [Formula: see text] values indicate that significantly 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.
AU  - Cheng,AF
AU  - Agrusa,HF
AU  - Barbee,BW
AU  - Meyer,AJ
AU  - Farnham,TL
AU  - Raducan,SD
AU  - Richardson,DC
AU  - Dotto,E
AU  - Zinzi,A
AU  - Della,Corte V
AU  - Statler,TS
AU  - Chesley,S
AU  - Naidu,SP
AU  - Hirabayashi,M
AU  - Li,J-Y
AU  - Eggl,S
AU  - Barnouin,OS
AU  - Chabot,NL
AU  - Chocron,S
AU  - Collins,GS
AU  - Daly,RT
AU  - Davison,TM
AU  - DeCoster,ME
AU  - Ernst,CM
AU  - Ferrari,F
AU  - Graninger,DM
AU  - Jacobson,SA
AU  - Jutzi,M
AU  - Kumamoto,KM
AU  - Luther,R
AU  - Lyzhoft,JR
AU  - Michel,P
AU  - Murdoch,N
AU  - Nakano,R
AU  - Palmer,E
AU  - Rivkin,AS
AU  - Scheeres,DJ
AU  - Stickle,AM
AU  - Sunshine,JM
AU  - Trigo-Rodriguez,JM
AU  - Vincent,J-B
AU  - Walker,JD
AU  - Wünnemann,K
AU  - Zhang,Y
AU  - Amoroso,M
AU  - Bertini,I
AU  - Brucato,JR
AU  - Capannolo,A
AU  - Cremonese,G
AU  - Dall'Ora,M
AU  - Deshapriya,PJD
AU  - Gai,I
AU  - Hasselmann,PH
AU  - Ieva,S
AU  - Impresario,G
AU  - Ivanovski,SL
AU  - Lavagna,M
AU  - Lucchetti,A
AU  - Epifani,EM
AU  - Modenini,D
AU  - Pajola,M
AU  - Palumbo,P
AU  - Perna,D
AU  - Pirrotta,S
AU  - Poggiali,G
AU  - Rossi,A
AU  - Tortora,P
AU  - Zannoni,M
AU  - Zanotti,G
DO  - 10.1038/s41586-023-05878-z
EP  - 460
PY  - 2023///
SN  - 0028-0836
SP  - 457
TI  - Momentum transfer from the DART mission kinetic impact on asteroid dimorphos
T2  - Nature
UR  - http://dx.doi.org/10.1038/s41586-023-05878-z
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36858075
UR  - https://www.nature.com/articles/s41586-023-05878-z
UR  - http://hdl.handle.net/10044/1/103214
VL  - 616
ER  -
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