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The impact and recovery of asteroid 2018 LA

Jenniskens, Peter and Gabadirwe, Mohutsiwa and Yin, Qing‐Zhu and Proyer, Alexander and Moses, Oliver and Kohout, Tomas and Franchi, Fulvio and Gibson, Roger L. and Kowalski, Richard and Christensen, Eric J. and Gibbs, Alex R. and Heinze, Aren and Denneau, Larry and Farnocchia, D. and Chodas, P. W. and Gray, William and Micheli, M. and Moskovitz, N. and Onken, Christopher A. and Wolf, Christian and Devillepoix, Hadrien and Ye, Quanzhi and Robertson, Darrel K. and Brown, Peter and Lyytinen, Esko and Moilanen, Jarmo and Albers, Jim and Cooper, Tim and Assink, Jelle and Evers, Laslo and Lahtinen, Panu and Lesedi, Seitshiro and Laubenstein, M. and Wantlo, Nggie and Moleje, Phemo and Maritinkole, J. and Suhonen, Heikki and Zolensky, M. and Ashwal, L. and Hiroi, T. and Sears, Derek W. and Sehlke, A. and Maturilli, Alessandro and Sanborn, M. E. and Huyskens, M. H. and Dey, Supratim and Ziegler, K. and Busemann, H. and Riebe, My E. I. and Meier, M. M. M. and Welten, K. C. and Caffee, M. W. and Zhou, Quin and Li, Qiu-Li and Li, Hian-Hua and Liu, Yu and Tang, Guo-Qiang and McLain, H. L. and Dworkin, J. P. and Glavin, D P and Schmitt-Kopplin, P. and Sabbah, Hassan and Joblin, C. and Granvik, Mikael and Mosarwa, B. and Botepe, K. (2021) The impact and recovery of asteroid 2018 LA. Meteoritics & Planetary Science, 56 (4). Wiley. doi: 10.1111/maps.13653. ISSN 1086-9379.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1111/maps.13653

Abstract

The June 2, 2018 impact of asteroid 2018 LA over Botswana is only the second asteroid detected in space prior to impacting over land. Here, we report on the successful recovery of meteorites. Additional astrometric data refine the approach orbit and define the spin period and shape of the asteroid. Video observations of the fireball constrain the asteroid's position in its orbit and were used to triangulate the location of the fireball's main flare over the Central Kalahari Game Reserve. Twenty-three meteorites were recovered. A consortium study of eight of these classifies Motopi Pan as an HED polymict breccia derived from howardite, cumulate and basaltic eucrite, and diogenite lithologies. Before impact, 2018 LA was a solid rock of ~156 cm diameter with high bulk density ~2.85 g cm−3, a relatively low albedo pV ~ 0.25, no significant opposition effect on the asteroid brightness, and an impact kinetic energy of ~0.2 kt. The orbit of 2018 LA is consistent with an origin at Vesta (or its Vestoids) and delivery into an Earth-impacting orbit via the ν6 resonance. The impact that ejected 2018 LA in an orbit toward Earth occurred 22.8 ± 3.8 Ma ago. Zircons record a concordant U-Pb age of 4563 ± 11 Ma and a consistent 207Pb/206Pb age of 4563 ± 6 Ma. A much younger Pb-Pb phosphate resetting age of 4234 ± 41 Ma was found. From this impact chronology, we discuss what is the possible source crater of Motopi Pan and the age of Vesta's Veneneia impact basin.

Item URL in elib:https://elib.dlr.de/142656/
Document Type:Article
Title:The impact and recovery of asteroid 2018 LA
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jenniskens, PeterSETI Institute, 189 Bernardo Avenue, Mountain View, California 94043, USA; NASA Ames Research Center, Moffett Field, California 94035, USAUNSPECIFIED
Gabadirwe, MohutsiwaBotswana Geoscience Institute, Plot 11566, Khama 1 Avenue, Plot 1734, Lobatse, BotswanaUNSPECIFIED
Yin, Qing‐ZhuDepartment of Earth and Planetary Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USAUNSPECIFIED
Proyer, AlexanderBotswana International University of Science and Technology, Private Bag 16, Palapye, BotswanaUNSPECIFIED
Moses, OliverUniversity of Botswana, Okavango Research Institute, Private Bag 285, Maun, BotswanaUNSPECIFIED
Kohout, TomasDepartment of Geosciences and Geography, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland; Ursa Finnish Fireball Network, Kopernikuksentie 1, FI-00130 Helsinki, FinlandUNSPECIFIED
Franchi, FulvioBotswana International University of Science and Technology, Private Bag 16, Palapye, BotswanaUNSPECIFIED
Gibson, Roger L.School of Geosciences, University of the Witwatersrand, P.O. WITS, Johannesburg 2050, South AfricaUNSPECIFIED
Kowalski, RichardCatalina Sky Survey, Lunar & Planetary Laboratory, The University of Arizona, 1629 E University Blvd., Tucson, Arizona, USAUNSPECIFIED
Christensen, Eric J.Catalina Sky Survey, Lunar & Planetary Laboratory, The University of Arizona, 1629 E University Blvd., Tucson, Arizona, USAUNSPECIFIED
Gibbs, Alex R.Catalina Sky Survey, Lunar & Planetary Laboratory, The University of Arizona, 1629 E University Blvd., Tucson, Arizona, USAUNSPECIFIED
Heinze, ArenATLAS, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822–1839, USAUNSPECIFIED
Denneau, LarryInstitute for Astronomy, University of HawaiiUNSPECIFIED
Farnocchia, D.JPL, Caltech, Pasadena, CA 91109, USAUNSPECIFIED
Chodas, P. W.JPL, Caltech, Pasadena, CA 91109, USAUNSPECIFIED
Gray, WilliamProject Pluto, 168 Ridge Road, Bowdoinham, Maine 04008, USAUNSPECIFIED
Micheli, M.ESA SSA-NEO Coordination Centre, I-00044 Frascati, ItalyUNSPECIFIED
Moskovitz, N.Lowell Observatory, Flagstaff, AZ 86001, USAUNSPECIFIED
Onken, Christopher A.Research School of Astronomy and Astrophysics, The Australian National University, Canberra, Australian Capital Territory 2611, AustraliaUNSPECIFIED
Wolf, ChristianResearch School of Astronomy and Astrophysics, The Australian National University, Canberra, Australian Capital Territory 2611, AustraliaUNSPECIFIED
Devillepoix, HadrienSchool of Earth and Planetary Sciences, Curtin University, Perth, Western Australia 6845, AustraliaUNSPECIFIED
Ye, QuanzhiDepartment of Astronomy, University of Maryland, College Park, Maryland 20742, USA; Division of Physics, Mathematics and Astronomy, Caltech, Pasadena, California 91125, USAUNSPECIFIED
Robertson, Darrel K.NASA Ames Research Center/Bay Area Environmental Research Institute, Mail Stop 245-3, Moffett Field, California 94035, USAUNSPECIFIED
Brown, PeterCentre for Planetary Science and Exploration, Western University, London, Ontario N6A 5B7, CanadaUNSPECIFIED
Lyytinen, EskoFinnish Fireball Network, Helsinki, FinlandUNSPECIFIED
Moilanen, JarmoUrsa Finnish Fireball Network, Kopernikuksentie 1, FI-00130 Helsinki, FinlandUNSPECIFIED
Albers, JimSETI Institute, 189 Bernardo Avenue, Mountain View, California 94043, USUNSPECIFIED
Cooper, TimAstronomical Society of Southern Africa, Suite 617, Private Bag X043, Benoni 1500, South AfricaUNSPECIFIED
Assink, JelleR&D Seismology and Acoustics, Royal Dutch Meteorological Institute, P.O. Box 201, NL-3730 AE De Bilt, the NetherlandsUNSPECIFIED
Evers, LasloR&D Seismology and Acoustics, Royal Dutch Meteorological Institute, P.O. Box 201, NL-3730 AE De Bilt, the Netherlands; Department of Geoscience and Engineering, Delft University of Technology, P.O. Box 5048, NL-2600 GA Delft, the NetherlandsUNSPECIFIED
Lahtinen, PanuUrsa Finnish Fireball Network, Kopernikuksentie 1, FI-00130 Helsinki, FinlandUNSPECIFIED
Lesedi, SeitshiroBotswana International University of Science and Technology, Private Bag 16, Palapye, BotswanaUNSPECIFIED
Laubenstein, M.Gran Sasso National Laboratory, National Institute for Nuclear Physics, Via G. Acitelli 22, I-67100 Assergi, ItalyUNSPECIFIED
Wantlo, NggieBotswana Geoscience Institute, Plot 11566, Khama 1 Avenue, Plot 1734, Lobatse, BotswanaUNSPECIFIED
Moleje, PhemoBotswana Geoscience Institute, Plot 11566, Khama 1 Avenue, Plot 1734, Lobatse, BotswanaUNSPECIFIED
Maritinkole, J.Botswana Geoscience Institute, Plot 11566, Khama 1 Avenue, Plot 1734, Lobatse, BotswanaUNSPECIFIED
Suhonen, HeikkiDepartment of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, FinlandUNSPECIFIED
Zolensky, M.NASA Johnson Space Center, Houston, USAUNSPECIFIED
Ashwal, L.School of Geosciences, University of the Witwatersrand, P.O. WITS, Johannesburg 2050, South AfricaUNSPECIFIED
Hiroi, T.Brown University, Providence, RI, USAUNSPECIFIED
Sears, Derek W.NASA Ames Research Center, Mountain View, California, USAUNSPECIFIED
Sehlke, A.NASA Ames Research Center/Bay Area Environmental Research Institute, Mail Stop 245-3, Moffett Field, California 94035, USAUNSPECIFIED
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.dehttps://orcid.org/0000-0003-4613-9799
Sanborn, M. E.Department of Earth and Planetary Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USAUNSPECIFIED
Huyskens, M. H.Department of Earth and Planetary Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USAUNSPECIFIED
Dey, SupratimDepartment of Earth and Planetary Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USAUNSPECIFIED
Ziegler, K.Institute of Meteoritics, University of New Mexico, 221 Yale Blvd NE, 331 Northrop Hall, Albuquerque, New Mexico 87131, USAUNSPECIFIED
Busemann, H.Open University, Milton Keynes, UKUNSPECIFIED
Riebe, My E. I.nstitute of Geochemistry and Petrology, ETH Z € urich, Clausiusstrasse 25, CH-8092 Zürich, SwitzerlandUNSPECIFIED
Meier, M. M. M.Naturmuseum St. Gallen, Rorschacher Strasse 263, CH-9016 St. Gallen, SwitzerlandUNSPECIFIED
Welten, K. C.Space Science Laboratory, University of California Berkeley, Berkeley, California 94720, USAUNSPECIFIED
Caffee, M. W.Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, Indiana 47907, USAUNSPECIFIED
Zhou, QuinNational Astronomical Observatories, Beijing, Chinese Academy of Sciences, Beijing 100012, ChinaUNSPECIFIED
Li, Qiu-LiNational Astronomical Observatories, Beijing, Chinese Academy of Sciences, Beijing 100012, ChinaUNSPECIFIED
Li, Hian-HuaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaUNSPECIFIED
Liu, YuState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaUNSPECIFIED
Tang, Guo-QiangState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaUNSPECIFIED
McLain, H. L.Department of Chemistry, Catholic University of America, 620 Michigan Ave, N.E., Washington, D.C. 20064, USA; NASA Goddard Space Flight Center, 8800 Greenbelt Rd., Greenbelt, Maryland 20771, USAUNSPECIFIED
Dworkin, J. P.NASA Goddard Space Flight Center, 8800 Greenbelt Rd., Greenbelt, Maryland 20771, USAUNSPECIFIED
Glavin, D PNASA Goddard Space Flight Center, 8800 Greenbelt Rd., Greenbelt, Maryland 20771, USAUNSPECIFIED
Schmitt-Kopplin, P.Analytical BioGeoChemistry, Helmholtz Zentrum München, Germany; Analytical Food Chemistry, Technische Universit € at M € unchen, D-85354 Freising-Weihenstephan, GermanyUNSPECIFIED
Sabbah, HassanIRAP, Universit  e de Toulouse, CNRS, CNES, Universit  e de Toulouse (UPS), F-31028 Toulouse Cedex 4, FranceUNSPECIFIED
Joblin, C.IRAP, Universit  e de Toulouse, CNRS, CNES, Universit  e de Toulouse (UPS), F-31028 Toulouse Cedex 4, FranceUNSPECIFIED
Granvik, MikaelUniversity of Helsinki; Asteroid Engineering Laboratory, Onboard Space Systems, Lule  a University of Technology, Box 848, S-981 28 Kiruna, SwedenUNSPECIFIED
Mosarwa, B.Botswana National Museum, 161 Queens Rd, Gaborone, BotswanaUNSPECIFIED
Botepe, K.Botswana Geoscience Institute, Plot 11566, Khama 1 Avenue, Plot 1734, Lobatse, BotswanaUNSPECIFIED
Date:23 April 2021
Journal or Publication Title:Meteoritics & Planetary Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:56
DOI :10.1111/maps.13653
Publisher:Wiley
ISSN:1086-9379
Status:Published
Keywords:Meteorite, Spectroscopy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project BepiColombo - MERTIS and BELA
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Deposited By: Maturilli, Dr. Alessandro
Deposited On:09 Jun 2021 07:28
Last Modified:09 Jun 2021 07:28

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