How Botswana Found a Predicted Asteroid Impact

Introduction

The Motopi Pan meteorites are one of Botswana’s most remarkable scientific treasures because they came from an asteroid that astronomers detected before it struck Earth. On 2 June 2018, the small asteroid designated 2018 LA was discovered only hours before atmospheric entry, allowing scientists to predict where it would fall. Weeks later, search teams recovered meteorite fragments in Botswana’s Central Kalahari Game Reserve, creating one of the very few cases in history where researchers could connect telescopic observations of an asteroid in space directly to physical rocks collected on the ground.[NASA Jet Propulsion Laboratory (JPL)]jpl.nasa.govNASA Jet Propulsion Laboratory (JPL)Tiny Asteroid Discovered Saturday Disintegrates Hours Later Over Southern Africa | NASA Jet Propulsio…

For Botswana, the event is significant not only as a scientific achievement but also as part of the country’s wider landscape of unusual collections. The Motopi Pan fragments link museum collections and geological research with a dramatic real-world event, showing how a fleeting fireball became a permanent part of Botswana’s natural heritage.

The detection of asteroid 2018 LA

Asteroid 2018 LA was first spotted by the Catalina Sky Survey in Arizona on the morning of 2 June 2018. Within hours, astronomers calculated that the object was on a collision course with Earth. Although only about 1.5 metres across, it became one of the very few asteroids ever observed before impact, following earlier successes with 2008 TC3 over Sudan and 2014 AA over the Atlantic Ocean.[NASA Jet Propulsion Laboratory (JPL)]jpl.nasa.govNASA Jet Propulsion Laboratory (JPL)Tiny Asteroid Discovered Saturday Disintegrates Hours Later Over Southern Africa | NASA Jet Propulsio…

Because the asteroid was so small, scientists expected it to break apart harmlessly high in the atmosphere. The predicted entry proved remarkably accurate. At approximately 16:44 UTC, observers across Botswana and neighbouring countries witnessed a brilliant fireball streaking across the sky before exploding over the Central Kalahari region. Security cameras, eyewitness videos and specialised fireball observations provided valuable data that allowed researchers to reconstruct the object’s final path with unusual precision.[NASA Jet Propulsion Laboratory (JPL)]jpl.nasa.govNASA Jet Propulsion Laboratory (JPL)Tiny Asteroid Discovered Saturday Disintegrates Hours Later Over Southern Africa | NASA Jet Propulsio…

This combination of telescopic tracking before impact and photographic evidence during atmospheric entry transformed what would normally have been an anonymous meteor into a fully documented scientific event.

How search teams recovered Motopi Pan fragments

Knowing approximately where the asteroid had broken apart did not immediately reveal where surviving fragments had landed. Researchers combined orbital calculations, atmospheric modelling and fireball observations to predict a strewn field within the Central Kalahari Game Reserve.

The first organised expedition took place between 18 and 23 June 2018. Scientists from the Botswana International University of Science and Technology, the Botswana Geoscience Institute, the University of Botswana’s Okavango Research Institute and international collaborators searched on foot across difficult terrain. The first recovered specimen, weighing just under 18 grams, was found near Motopi Pan, giving the meteorite its official name.[PMC]pmc.ncbi.nlm.nih.govThe impact and recovery of asteroid 2018 LA - PMC…

Improved calculations later refined the expected distribution of fragments. A second expedition in October 2018 recovered another 22 meteorites, bringing the total to 23 documented pieces. The recovery involved Botswana’s Department of National Museum and Monuments, wildlife authorities, international planetary scientists and members of the Astronomical Society of Southern Africa.[assa.saao.ac.za]assa.saao.ac.zathe botswana super bolide and meteorites from asteroid 2018 laThe Botswana super-bolide and meteorites from asteroid 2018 LA | ASSA…

The operation demonstrated how modern asteroid science depends on cooperation between observatories, local institutions, field geologists and museum specialists rather than astronomers alone.

What the meteorites revealed

Laboratory analysis showed that Motopi Pan is not an ordinary stony meteorite. It is classified as a howardite, a type of HED (Howardite–Eucrite–Diogenite) achondrite formed from volcanic rocks that originated on the asteroid 4 Vesta, one of the largest bodies in the asteroid belt. Rather than being primitive material left over from the birth of the Solar System, these rocks come from a body that once experienced volcanic activity and crust formation.[LPI]lpi.usra.eduLPIMeteoritical Bulletin: Entry for Motopi PanLPIMeteoritical Bulletin: Entry for Motopi Pan

Researchers concluded that asteroid 2018 LA was probably ejected from Vesta after an ancient collision before eventually entering an Earth-crossing orbit through gravitational interactions within the asteroid belt. Detailed studies of minerals and isotopes recorded a geological history extending back more than 4.5 billion years while also preserving evidence of later impact events on Vesta itself.[TU Delft Research Portal]research.tudelft.nlthe impact and recovery of asteroid 2018 laTU Delft Research PortalThe impact and recovery of asteroid 2018 LA - TU Delft Research Portal…

Because scientists observed the asteroid before impact, they could compare its telescopic brightness, shape, orbit and size with the physical meteorites recovered afterwards. Few meteorites offer such a complete scientific record linking an object in space with specimens in the laboratory.

What visitors may encounter in museum collections

The Motopi Pan meteorites are unusual because their importance lies as much in their documented history as in their appearance. Individual fragments are generally small, dark stones with fusion crust formed during atmospheric entry. On their own they resemble many other meteorites, but their value comes from the exceptional chain of evidence connecting discovery, prediction, recovery and laboratory analysis.[LPI]lpi.usra.eduLPIMeteoritical Bulletin: Entry for Motopi PanLPIMeteoritical Bulletin: Entry for Motopi Pan

Within Botswana’s museum and scientific collections, these specimens help explain:

Unlike many famous meteorites that were found long after falling, Motopi Pan preserves the complete story from space to museum collection.

Why Motopi Pan matters in Botswana’s curiosity landscape

Botswana has relatively few purpose-built museums devoted to scientific curiosities, making the Motopi Pan meteorites especially distinctive. They represent an unusual meeting point between astronomy, geology, museum collecting and public interest in dramatic natural events.

For visitors interested in unusual collections, the fragments stand apart because they are not simply rare rocks. They are tangible remains of an event that scientists watched unfold almost in real time: an asteroid discovered in space, tracked to Earth, recovered from the Kalahari and preserved as evidence of one of the best-documented meteorite falls in modern history. In Botswana’s wider landscape of curious heritage, few objects demonstrate the connection between global scientific collaboration and local natural history as clearly as the Motopi Pan meteorites.

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Endnotes

1. Source: jpl.nasa.gov
Link:https://www.jpl.nasa.gov/news/tiny-asteroid-discovered-saturday-disintegrates-hours-later-over-southern-africa/

2. Source: pmc.ncbi.nlm.nih.gov
Link:https://pmc.ncbi.nlm.nih.gov/articles/PMC7611328/

3. Source: lpi.usra.edu
Title: LPIMeteoritical Bulletin: Entry for Motopi Pan
Link:https://www.lpi.usra.edu/meteor/metbull.cfm?code=74065

4. Source: assa.saao.ac.za
Title: the botswana super bolide and meteorites from asteroid 2018 la
Link:https://assa.saao.ac.za/sections/comet-asteroid-meteor-section/the-botswana-super-bolide-and-meteorites-from-asteroid-2018-la/

5. Source: ntrs.nasa.gov
Title: Here, we report on th
Link:https://ntrs.nasa.gov/citations/20210015467

Published: April 23, 2021

6. Source: ntrs.nasa.gov
Title: Here, we report on th
Link:https://ntrs.nasa.gov/citations/20210015017

Published: April 23, 2021

7. Source: jpl.nasa.gov
Link:https://www.jpl.nasa.gov/images/pia22468-asteroid-2018-la/

8. Source: science.nasa.gov
Title: asteroid 2018 la
Link:https://science.nasa.gov/photojournal/asteroid-2018-la/

9. Source: research.tudelft.nl
Title: the impact and recovery of asteroid 2018 la
Link:https://research.tudelft.nl/en/publications/the-impact-and-recovery-of-asteroid-2018-la/

10. Source: pubmed.ncbi.nlm.nih.gov
Title: Here, we report on the successful recovery of meteorite
Link:https://pubmed.ncbi.nlm.nih.gov/34295141/

Published: April 23, 2021

11. Source: authors.library.caltech.edu
Title: Here, we report on the successful recovery of meteorites
Link:https://authors.library.caltech.edu/records/zr7yh-emm58/latest

Published: April 23, 2021

12. Source: lpi.usra.edu
Link:https://www.lpi.usra.edu/meteor/metbull.cfm?ants=&browse=&categ=All&code=74065&country=All&falls=&lrec=50000&map=ge&mblist=All&nwas=&phot=no&pnt=Normal+table&rect=&sea=Howardite&sfor=types&snew=0&srt=name&strewn=no&stype=exact&valids=

13. Source: lpi.usra.edu
Link:https://www.lpi.usra.edu/meteor/metbull.cfm?ants=no&browse=&categ=All&code=74065&country=All&falls=yes&lrec=50&map=ge&mblist=All&nwas=&phot=&pnt=Normal+table&rect=&sea=%2A&sfor=names&snew=6000&srt=name&strewn=&stype=contains&valids=

14. Source: lpi.usra.edu
Link:https://www.lpi.usra.edu/meteor/metbull.cfm?ants=&browse=&categ=All&code=74065&country=Botswana&falls=&lrec=50&map=ge&mblist=All&nwas=&phot=no&pnt=Normal+table&rect=&sea=Ghanzi&sfor=places&snew=0&srt=name&strewn=no&stype=exact&valids=

15. Source: researchportalplus.anu.edu.au
Title: the impact and recovery of asteroid 2018 la
Link:https://researchportalplus.anu.edu.au/en/publications/the-impact-and-recovery-of-asteroid-2018-la/

16. Source: openresearch-repository.anu.edu.au
Link:https://openresearch-repository.anu.edu.au/items/7fa66482-7be7-45f0-8794-8a88bf09c475

Additional References

17. Source: youtube.com
Link:https://www.youtube.com/watch?v=vVrQ83slZv0

18. Source: youtube.com
Link:https://www.youtube.com/watch?v=8VZJICtcAFw

Published: June 4, 2018

19. Source: youtube.com
Link:https://www.youtube.com/watch?v=SrzSwBp7i3M

20. Source: youtube.com
Link:https://www.youtube.com/watch?v=5Ljnnq4eCAY

Published: June 4, 2018

21. Source: youtube.com
Title: Final Frontier | Meteorite Crashes in Botswana
Link:https://www.youtube.com/watch?v=9f9jQlnfSOQ

22. Source: wits.ac.za
Title: fragment of impacting asteroid recovered in botswana
Link:https://www.wits.ac.za/news/sources/science-news/2018/fragment-of-impacting-asteroid-recovered-in-botswana.html

23. Source: onlinelibrary.wiley.com
Link:https://onlinelibrary.wiley.com/doi/full/10.1111/maps.13653

24. Source: knmi.nl
Link:https://www.knmi.nl/kennis-en-datacentrum/publicatie/the-impact-and-recovery-of-asteroid-2018-la