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'''{{mp|2024 BX|1}}''', previously known under its temporary designation '''Sar2736''', was a metre-sized ] or ] that entered Earth's atmosphere on 21 January 2024 00:33 ] and disintegrated as a ] over ].<ref name="MPEC-2024-B76"/><ref name="NYT-20240210">{{cite news |last=O'Callaghan |first=Jonathan |title=Fragments of Asteroid With Mystery Origin Are Found Outside Berlin - Astronomers tracked the entry of a small space rock into Earth’s atmosphere, and then meteorite hunters made an unexpected discovery. |url=https://www.nytimes.com/2024/02/10/science/aubrite-asteroid-meteorite-berlin.html |date=10 February 2024 |work=] |url-status=live |archiveurl=https://archive.today/20240210183139/https://www.nytimes.com/2024/02/10/science/aubrite-asteroid-meteorite-berlin.html |archivedate=10 February 2024 |accessdate=10 February 2024 }}</ref> It was discovered less than three hours before impact by Hungarian astronomer ] at ]'s ] in the ], ].<ref name="MPEC-2024-B76"/> The ] was observed by the cameras of the AllSky7<ref>{{Cite web |title=german@allsky7.groups.io {{!}} SAR2736 |url=https://allsky7.groups.io/g/german/topic/103861190#5030 |access-date=2024-01-21 |website=allsky7.groups.io}}</ref> and Fripon<ref>{{Cite web |title=Single event view (773388) |url=https://fireball.fripon.org/displaysingle.php?id=773388 |access-date=2024-01-21 |website=fireball.fripon.org}}</ref> networks. {{mp|2024 BX|1}} is the eighth asteroid discovered before impacting Earth, and is Sárneczky's third discovery of an impacting asteroid. Before it impacted, {{mp|2024 BX|1}} was a ] on an Earth-crossing ] orbit. |
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'''{{mp|2024 BX|1}}''', previously known under its temporary designation '''Sar2736''', was a metre-sized ] or ] that entered Earth's atmosphere on 21 January 2024 00:33 ] and disintegrated as a ] over ].<ref name="MPEC-2024-B76"/><ref name="NYT-20240210">{{cite news |last=O'Callaghan |first=Jonathan |title=Fragments of Asteroid With Mystery Origin Are Found Outside Berlin - Astronomers tracked the entry of a small space rock into Earth’s atmosphere, and then meteorite hunters made an unexpected discovery. |url=https://www.nytimes.com/2024/02/10/science/aubrite-asteroid-meteorite-berlin.html |date=10 February 2024 |work=] |url-status=live |archiveurl=https://archive.today/20240210183139/https://www.nytimes.com/2024/02/10/science/aubrite-asteroid-meteorite-berlin.html |archivedate=10 February 2024 |accessdate=10 February 2024 }}</ref> It was discovered less than three hours before impact by Hungarian astronomer ] at ]'s ] in the ], ].<ref name="MPEC-2024-B76"/> The ] was observed by the cameras of the AllSky7<ref>{{Cite web |title=german@allsky7.groups.io {{!}} SAR2736 |url=https://allsky7.groups.io/g/german/topic/103861190#5030 |access-date=2024-01-21 |website=allsky7.groups.io}}</ref> and Fripon<ref>{{Cite web |title=Single event view (773388) |url=https://fireball.fripon.org/displaysingle.php?id=773388 |access-date=2024-01-21 |website=fireball.fripon.org}}</ref> networks. {{mp|2024 BX|1}} is the eighth asteroid discovered before impacting Earth, and is Sárneczky's third discovery of an impacting asteroid. Before it impacted, {{mp|2024 BX|1}} was a ] on an Earth-crossing ] orbit. |
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Meteorite fragments of {{mp|2024 BX|1}} were found five days after it entered the Earth's atmosphere.<ref>{{Cite web |last=King |first=Bob |authorlink= Bob P. King |date=26 January 2024 |title=ASTEROID 2024 BX1: FROM A DOT OF LIGHT TO FIREBALL TO ROCKS ON THE GROUND |url=https://skyandtelescope.org/astronomy-news/asteroid-2024-bx1-from-a-dot-of-light-to-fireball-to-rocks-on-the-ground/ |access-date=27 January 2024 |website=Sky & Telescope}}</ref><ref>{{Cite tweet|user=SAL_DLR_Berlin|number=1750931305351504356|title=And here we go! The joint team from @DLR_en, @mfnberlin and @FU_Berlin managed to recover two fragments that are thought to be from asteroid #2024BX1. We will still be going to the field in the next few days with the hope of finding more material to study! #meteorites}}</ref> It was later found to be an ], a rare group of meteorites.<ref>{{cite news|title=Asteroid that impacted near Berlin identified as a rare Aubrite|url=https://www.seti.org/press-release/asteroid-impacted-near-berlin-identified-rare-aubrite|website=SETI|date=5 February 2024|accessdate=6 February 2024}}</ref> A study from July 2024 describe the meteorite fragments that are called '''Ribbeck''', named after the village ] close to the sample find. About 200 pieces were collected, totalling in about 1.8 kg. The study measured short-lived ] in the samples AKM01 and AKM05. Ribbeck is consistent with a ] aubrite. The samples are made up of 76 ±3 vol% nearly FeO-free ], 15.0 ±2.5 vol% albitic ], 5.5 ±1.5 vol% ] and 3.5 ±1.0 vol% of opaque phases (mainly ] and metals), with traces of nearly FeO-free ] and ]. The researchers found that the plagioclase fragments in Ribbeck formed from coarse-grained ] that cooled slowly and that were fragmented by ] on the parent body. The albitic plagioclase content is one of the highest among all aubrites, similar to the aubrite of Bishopville (see ]). This causes ] measurements to be higher in both meteorites. It is suggested that 2024 BX<sub>1</sub> belongs to the ] and therefore is similar to the ]. The rock showed signs of ] and ]. The 4 days of weathering in the snow/melted snow gave the samples a brown color and the breakdown of sulfides gave the samples a smell of ] (rotten egg smell). Some minerals (], a ]-rich phase and a ]-rich phase) showed strong alteration, but it is unclear if this happened partially before the meteorite impact or if it is only due to weathering.<ref name="Bischoff2024"/> |
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Meteorite fragments of {{mp|2024 BX|1}} were found five days after it entered the Earth's atmosphere.<ref>{{Cite web |last=King |first=Bob |authorlink= Bob P. King |date=26 January 2024 |title=ASTEROID 2024 BX1: FROM A DOT OF LIGHT TO FIREBALL TO ROCKS ON THE GROUND |url=https://skyandtelescope.org/astronomy-news/asteroid-2024-bx1-from-a-dot-of-light-to-fireball-to-rocks-on-the-ground/ |access-date=27 January 2024 |website=Sky & Telescope}}</ref><ref>{{Cite tweet|user=SAL_DLR_Berlin|number=1750931305351504356|title=And here we go! The joint team from @DLR_en, @mfnberlin and @FU_Berlin managed to recover two fragments that are thought to be from asteroid #2024BX1. We will still be going to the field in the next few days with the hope of finding more material to study! #meteorites}}</ref> Searches were conducted by the ] (DLR), the Berlin universities, members of the ] and ]. The first samples were found by ] searchers close to the village ].<ref name="Bischoff2024" /> It was later found to be an ], a rare group of meteorites.<ref>{{cite news|title=Asteroid that impacted near Berlin identified as a rare Aubrite|url=https://www.seti.org/press-release/asteroid-impacted-near-berlin-identified-rare-aubrite|website=SETI|date=5 February 2024|accessdate=6 February 2024}}</ref> A study from July 2024 describe the meteorite fragments that are called '''Ribbeck'''. About 200 pieces were collected, totalling in about 1.8 kg. The study measured short-lived ] in the samples AKM01 and AKM05. Ribbeck is consistent with a ] aubrite. The samples are made up of 76 ±3 vol% nearly FeO-free ], 15.0 ±2.5 vol% albitic ], 5.5 ±1.5 vol% ] and 3.5 ±1.0 vol% of opaque phases (mainly ] and metals), with traces of nearly FeO-free ] and ]. The researchers found that the plagioclase fragments in Ribbeck formed from coarse-grained ] that cooled slowly and that were fragmented by ] on the parent body. The albitic plagioclase content is one of the highest among all aubrites, similar to the aubrite of Bishopville (see ]). This causes ] measurements to be higher in both meteorites. It is suggested that 2024 BX<sub>1</sub> belongs to the ] and therefore is similar to the ]. The rock showed signs of ] and ]. The 4 days of weathering in the snow/melted snow gave the samples a brown color and the breakdown of sulfides gave the samples a smell of ] (rotten egg smell). Some minerals (], a ]-rich phase and a ]-rich phase) showed strong alteration, but it is unclear if this happened partially before the meteorite impact or if it is only due to weathering.<ref name="Bischoff2024"/> The researchers estimated that the parent body of Ribbeck is 4.5 billion years old.<ref>{{Cite web |last=Design |first=Universität Münster, University of Münster, Web and |title=Ribbeck meteorite from the Havelland is 4.5 billion years old |url=https://www.uni-muenster.de/news/view.php?cmdid=14207&lang=en |access-date=2024-08-04 |website=www.uni-muenster.de |language=en}}</ref> Aubrites formed very early within a few Million years after the formation of ] (~4.56 billion years old) and for Ribbeck ages were determined with the help of ] (~3.3–3.7 billion years) and ]/]-] dating (~2.3–2.5 billion years). These younger ages are indications for impact events.<ref name="Bischoff2024" /> |
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== Exhibition == |
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The meteorite was exhibited at the ] in Berlin for a few weeks in March 2024.<ref>{{Cite web |date=2024-03-05 |title=Spectacular meteorite to be exhibited at the Museum für Naturkunde Berlin |url=https://www.museumfuernaturkunde.berlin/en/press/press-releases/spectacular-meteorite-be-exhibited-museum-fur-naturkunde-berlin |access-date=2024-08-04 |website=Museum für Naturkunde |language=en}}</ref> |
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== Gallery == |
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== Gallery == |
A fragment of 2024 BX1
Sample of Ribbeck found after 6 days and showing terrestrial alteration, giving the sample a brown color
Olivine in Ribbeck, showing fracture lines, indicative of shock metamorphism
Thin sections of 2024 BX1 samples, with enstatite crystals (En), olivine (Ol), plagioclase (Plag) and metal (Met)
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