Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
2008 TC3
open-in-new
<h2 id="discovery">Discovery</h2> <p>The asteroid was discovered by <a href="/facts/Richard_A._Kowalski/JXJ07Iew">Richard A. Kowalski</a> at the <a href="/facts/Catalina_Sky_Survey/6GmVAEdE">Catalina Sky Survey</a> (CSS) 1.5-meter telescope at <a href="/facts/Mount_Lemmon/dlM05ybN">Mount Lemmon</a>, north of <a href="/facts/Tucson,_Arizona/26QPvEaG">Tucson, Arizona</a>, US, on October 6, 06:39 UTC, 19 hours before the impact.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a><a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a><a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p><p>It was notable as the first such body to be observed and tracked prior to reaching Earth.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> The process of detecting and tracking a <a href="/facts/Near-Earth_object/UwnPRnSN">near-Earth object</a>, an effort sometimes referred to as <a href="/facts/Spaceguard/KFsppyP3">Spaceguard</a>, was put to the test. In total, 586 astrometric and almost as many photometric observations were performed by 27 amateur and professional observers in less than 19 hours and reported to the <a href="/facts/Minor_Planet_Center/v8T7sdK4">Minor Planet Center</a>, which in eleven hours issued 25 Minor Planet Electronic Circulars with new orbit solutions as observations poured in. On October 7, 01:49 UTC,<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> the asteroid entered the shadow of the Earth, which made further observations impossible. </p><p>Impact predictions were performed by <a href="/facts/University_of_Pisa/EXvLLKQr">University of Pisa</a>'s CLOMON 2 semi-automatic monitoring system<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a><a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> as well as <a href="/facts/Jet_Propulsion_Laboratory/zPXnxRBf">Jet Propulsion Laboratory's</a> <a href="/facts/Sentry_(monitoring_system)/u3ubJjFe">Sentry</a> system. Spectral observations that were performed by astronomers at the 4.2-meter <a href="/facts/William_Herschel_Telescope/5E6DjVoy">William Herschel Telescope</a> at <a href="/facts/La_Palma/3J7sj2oo">La Palma</a>, <a href="/facts/Canary_Islands/7lfpqymu">Canary Islands</a> are consistent with either a <a href="/facts/C-type_asteroid/WRGFmzAT">C-type</a> or <a href="/facts/M-type_asteroid/4vojHN4A">M-type asteroid</a>. </p> <h2 id="entry">Entry</h2> <p>The <a href="/facts/Meteor/gcoGYw6o">meteor</a> entered Earth's atmosphere above northern <a href="/facts/Sudan/yGeaNdvS">Sudan</a> at 02:46 UTC (05:46 local time) on October 7, 2008, with a velocity of 12.8 kilometers per second (29,000 mph) at an <a href="/facts/Azimuth/kEyt9nJ3">azimuth</a> of 281 degrees and an altitude angle of 19 degrees to the local horizon. It exploded tens of kilometers above the ground with the energy of 0.9 to 2.1 <a href="/facts/TNT_equivalent/nEQ5z8mp">kilotons of TNT</a> over a remote area of the <a href="/facts/Nubian_Desert/f1NxCcBL">Nubian Desert</a>, causing a large fireball or <a href="/facts/Meteoroid/5PexF2mR">bolide</a>.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> </p><p><i><a href="/facts/The_Times/5BwkodnX">The Times</a></i> reported that the meteor's "light was so intense that it lit up the sky like a full moon, and an airliner 1,400 km (870 mi) away reported seeing the bright flash."<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> A webcam captured the flash lighting up <a href="/facts/El-Gouna/zPPtWmWo">El-Gouna</a> beach 725 kilometres north of the explosion (see this webcam frame).<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> A low-resolution image of the explosion was captured by the weather satellite <a href="/facts/Meteosat_8/6FBFtTXd">Meteosat 8</a>.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> The Meteosat images place the fireball at <a href="https://geohack.toolforge.org/geohack.php?pagename=2008_TC3¶ms=21_N_32.15_E_&title=2008+TC%3Csub%3E3%3C%2Fsub%3E+fireball">21°00′N 32°09′E / 21.00°N 32.15°E / 21.00; 32.15 (2008 TC3 fireball)</a>.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a> <a href="/facts/Infrasound/yCUJSSe3">Infrasound</a> detector arrays in <a href="/facts/Kenya/Y9Ko9pQu">Kenya</a> also detected a sound wave from the direction of the expected impact corresponding to energy of 1.1 to 2.1 kilotons of TNT.<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a> Asteroids of this size hit Earth about two or three times a year.<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a> </p><p>The trajectory showed intersection with Earth's surface at roughly <a href="https://geohack.toolforge.org/geohack.php?pagename=2008_TC3¶ms=20.3_N_33.5_E_&title=2008+TC%3Csub%3E3%3C%2Fsub%3E+projected+impact">20°18′N 33°30′E / 20.3°N 33.5°E / 20.3; 33.5 (2008 TC3 projected impact)</a><a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a> though the object was expected to break up perhaps 100–200 kilometers (60–120 mi) west as it descended, somewhat east of the <a href="/facts/Nile_River/vGoXVUFH">Nile River</a>, and about 100 kilometers (60 mi) south of the <a href="/facts/Egypt/8Ttg0JwB">Egypt</a>–Sudan border. </p><p>According to U.S. government sources<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a><a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a> U.S. satellites detected the impact at 02:45:40 UT, with the initial detection at <a href="https://geohack.toolforge.org/geohack.php?pagename=2008_TC3¶ms=20.9_N_31.4_E_&title=2008+TC%3Csub%3E3%3C%2Fsub%3E+initial+detection">20°54′N 31°24′E / 20.9°N 31.4°E / 20.9; 31.4 (2008 TC3 initial detection)</a> at 65.4 kilometers (40.6 <a href="/facts/Mile/e22bY569">mi</a>; 35.3 <a href="/facts/Nautical_mile/V4yJzvKw">nmi</a>) altitude and final explosion at <a href="https://geohack.toolforge.org/geohack.php?pagename=2008_TC3¶ms=20.8_N_32.2_E_&title=2008+TC%3Csub%3E3%3C%2Fsub%3E+final+explosion">20°48′N 32°12′E / 20.8°N 32.2°E / 20.8; 32.2 (2008 TC3 final explosion)</a> at 37 kilometers (23 mi; 20 nmi) altitude. These images have not been publicly released. </p> <h2 id="recovered-fragments">Recovered fragments</h2> <p>A search of the impact zone that began on December 6, 2008, turned up 10.5 kilograms (23 lb) of rock in some 600 fragments. These <a href="/facts/Meteorite/NsmHlBlX">meteorites</a> are collectively named Almahata Sitta<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a> (<a href="/facts/Arabic_language/A1e66hVV">Arabic</a>: المحطة ستة), which means "Station Six"<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a> and is a train station between <a href="/facts/Wadi_Halfa/khUqv49h">Wadi Halfa</a> and <a href="/facts/Khartoum/qLorvydI">Khartoum</a>, Sudan. This search was led by <a href="/facts/Peter_Jenniskens/lHvz8ptn">Peter Jenniskens</a> from the <a href="/facts/SETI_Institute/WLsMEGJm">SETI Institute</a>, <a href="/facts/California/zLW2vdQJ">California</a> and Muawia Shaddad of the <a href="/facts/University_of_Khartoum/HvAMXSkJ">University of Khartoum</a> in <a href="/facts/Sudan/yGeaNdvS">Sudan</a> and carried out with the collaboration of students and staff of the University of Khartoum. The initial 15 meteorites were found in the first three days of the search. Numerous witnesses were interviewed, and the hunt was guided with a search grid and specific target area produced by <a href="/facts/NASA/TIMCV0yV">NASA</a>'s <a href="/facts/Jet_Propulsion_Laboratory/zPXnxRBf">Jet Propulsion Laboratory</a> in <a href="/facts/Pasadena,_California/Y6AEEI03">Pasadena, California</a>.<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a><a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a><a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a><a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a><a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a> </p><p>Samples of the Almahata Sitta meteorite were sent for analysis to a consortium of researchers led by Jenniskens, the Almahata Sitta consortium, including <a href="/facts/NASA_Ames_Research_Center/DQUsdLam">NASA Ames</a> in <a href="/facts/California/zLW2vdQJ">California</a>, the <a href="/facts/Johnson_Space_Center/rN6Jvhqe">Johnson Space Center</a> in <a href="/facts/Houston/1v8AwQUN">Houston</a>, the <a href="/facts/Carnegie_Institution_of_Washington/zS5MqNUP">Carnegie Institution of Washington</a>, and <a href="/facts/Fordham_University/LX3CbuzH">Fordham University</a> in <a href="/facts/New_York_City/YlyvFmVC">New York City</a>. The first sample measured was an anomalous ultra-fine-grained porous <a href="/facts/Conglomerate_(geology)/llpnLX76">polymict</a> <a href="/facts/Ureilite/nv8UN6qp">ureilite</a> <a href="/facts/Achondrite/X3xuMvue">achondrite</a>, with large <a href="/facts/Carbonaceous_chondrite/TnCY8ssz">carbonaceous grains</a>. Reflectance spectra of the meteorite, combined with the astronomical observations, identified 2008 TC3 as an <a href="/facts/F-type_asteroid/UJLaSWz8">F-type asteroid</a>. Fragile anomalous dark carbon-rich <a href="/facts/Ureilite/nv8UN6qp">ureilites</a> like in the Almahata Sitta meteorite are now firmly linked to the group of F-class asteroids.<a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a> <a href="/facts/Amino_acids/WDxYwBny">Amino acids</a> have been found on the meteorite.<a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a> The nanodiamonds found in the meteorite were shown to have grown slowly, implying that the source is another planet in the <a href="/facts/Solar_System/QIcLSazQ">Solar System</a>.<a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a> More recently, in December 2020, further studies on the fragments have been reported. These studies revealed an extremely rare form of hydrated crystals, in a fragment called AhS 202, known as <a href="/facts/Amphibole/2Nf6RDRA">amphibole</a>, suggesting to the researchers that 2008 TC3 early on likely belonged to a very large Ceres-class <a href="/facts/Dwarf_planet/IkQoCdwD">dwarf planet</a>.<a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a> </p><p><a href="/facts/Richard_Kowalski/JXJ07Iew">Richard Kowalski</a>, who discovered the object, received a tiny fragment of Almahatta Sitta, a gift from friends and well-wishers on the Minor Planet Mailing List, which Kowalski founded in order to help connect professional and amateur astronomers.<a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a> </p> <h2 id="gallery">Gallery</h2> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Asteroid_impact_prediction/9uTmkLQl">Asteroid impact prediction</a></li> <li><a href="/facts/1972_Great_Daylight_Fireball/KSe1TJXJ">1972 Great Daylight Fireball</a></li> <li><a href="/facts/2014_AA/EjMrwzff">2014 AA</a></li> <li><a href="/facts/2018_LA/y9dKJn3e">2018 LA</a></li> <li><a href="/facts/2019_MO/FTLXajHc">2019 MO</a></li> <li><a href="/facts/2022_EB5/WN19AQBG">2022 EB5</a></li> <li><a href="/facts/2022_WJ1/kcnR1pPs">2022 WJ1</a></li> <li><a href="/facts/2023_CX1/7pmKX9bv">2023 CX1</a></li> <li><a href="/facts/Impact_event/fbWu9Q4p">Impact event</a></li> <li><a href="/facts/List_of_notable_asteroids/sm8zjMNC">List of notable asteroids</a></li> <li><a href="/facts/WT1190F/Ppb6r2wI">WT1190F</a></li></ul> <h2 id="further-reading">Further reading</h2> <ul><li>Atkinson, N. (October 13, 2008). <a href="http://www.universetoday.com/2008/10/13/where-are-the-images-from-asteroid-2008-tc3/">"Where Are the Images from Asteroid 2008 TC3?"</a>. <a href="/facts/Universe_Today/kYo1SQSB">Universe Today</a>. <a href="https://web.archive.org/web/20090215155840/http://www.universetoday.com/2008/10/13/where-are-the-images-from-asteroid-2008-tc3/">Archived</a> from the original on February 15, 2009. Retrieved June 8, 2009.</li> <li><a href="http://news.bbc.co.uk/2/hi/uk_news/northern_ireland/7964309.stm">"80-ton asteroid's impact recorded"</a>. <i><a href="/facts/BBC_News/oGAe2H8E">BBC News</a></i>. March 25, 2009. Retrieved August 13, 2013.</li> <li>Dockweiler, T. (March 12, 2009). <a href="https://web.archive.org/web/20120222144723/http://img-srv.dtcbuilder.com/engine/builder/images/2/8/0/8/5/4/file/6.pdf">"Earth's First Pre-Known Asteroid Impact: The Sudan Event of October 7, 2008"</a> (PDF). <i>Science Newsletter</i>. 4 (3). Triton Fun Company: 1–2. Archived from <a href="http://img-srv.dtcbuilder.com/engine/builder/images/2/8/0/8/5/4/file/6.pdf">the original</a> (PDF) on February 22, 2012. Retrieved August 13, 2013.</li> <li>Gayon-Markt, J.; Delbo, M.; Morbidelli, A.; Marchi, S. (April 30, 2012). <a href="https://doi.org/10.1111%2Fj.1365-2966.2012.21220.x">"On the origin of the Almahata-Sitta meteorite and 2008 TC3 asteroid"</a>. <i><a href="/facts/Monthly_Notices_of_the_Royal_Astronomical_Society/3VkrFnzg">Monthly Notices of the Royal Astronomical Society</a></i>. 424 (1): 508–518. <a href="/facts/ArXiv_(identifier)/H6EtgnBe">arXiv</a>:<a href="https://arxiv.org/abs/1206.3042">1206.3042</a>. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2012MNRAS.424..508G">2012MNRAS.424..508G</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1111%2Fj.1365-2966.2012.21220.x">10.1111/j.1365-2966.2012.21220.x</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:119242802">119242802</a>.</li> <li>Lakdawalla, E. (October 7, 2008). <a href="http://www.planetary.org/blogs/emily-lakdawalla/2008/1684.html">"The full story of Earth-impacting asteroid 2008 TC3"</a>. <a href="/facts/The_Planetary_Society/rAuRH7IK">The Planetary Society</a>. Retrieved August 13, 2013.</li> <li>Yeomans, D. (October 7, 2008). <a href="https://web.archive.org/web/20130406122509/http://neo.jpl.nasa.gov/news/news159.html">"Small Asteroid Predicted to Cause Brilliant Fireball over Northern Sudan"</a>. <a href="/facts/Near_Earth_Object_Program/wvh36wCY">Near Earth Object Program</a>. Archived from <a href="https://neo.jpl.nasa.gov/news/news159.html">the original</a> on April 6, 2013. Retrieved August 13, 2013.</li></ul> <h2 id="external-links">External links</h2> Wikimedia Commons has media related to 2008 TC3. <ul><li><a href="https://web.archive.org/web/20130801103648/http://spaceweather.com/submissions/large_image_popup.php?image_name=Ernesto-Guido-Giovanni-Sostero-a-Virgilio-Gonano-2008TC3_2008Oct06_AFAM_1223345558.jpg">Remanzacco Observatory photographs of the incoming space rock</a></li> <li><a href="https://web.archive.org/web/20121109020914/http://www.tng.iac.es/users/boschin/Astrophotos/neo2008tc3b.jpg">Telescopio Nazionale Galileo photograph of 2008 TC3</a></li> <li><a href="https://web.archive.org/web/20081112010343/http://marek.mahut.sk/blog/2008/10/06/small-planetoid-8ta9d69-will-cross-earth/">Announcement with animation</a></li> <li><a href="http://pagesperso-orange.fr/pgj/ELG.gif">"webcam record of flash effect from Red Sea beach at El Gouna, Egypt, 725 km away"</a> (GIF). <a href="https://web.archive.org/web/20110314184526/http://pagesperso-orange.fr/pgj/ELG.gif">Archived</a> from the original on March 14, 2011. Retrieved June 8, 2009.</li> <li><a href="https://apod.nasa.gov/apod/ap090328.html">NASA Astronomy Picture of the Day: Almahata Sitta 15 (March 28, 2009)</a></li> <li><a href="http://www.minorplanetcenter.net/db_search/show_object?object_id=2008+TC3">2008 TC3 orbit and observations</a> at <a href="/facts/IAU/GMFPImXo">IAU</a> <a href="/facts/Minor_Planet_Center/v8T7sdK4">Minor Planet Center</a></li> <li><a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.0">2008 TC3</a> at <i>NeoDyS-2, Near Earth Objects—Dynamic Site</i> <ul><li><a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.3.0">Ephemerides</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.4.0">Observation prediction</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.1">Orbital info</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.5">MOID</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.6">Proper elements</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.7.0">Observational info</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.8">Close approaches</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.9">Physical info</a> · <a href="https://newton.spacedys.com/neodys/index.php?n=2008+TC3&pc=1.1.A">Orbit animation</a></li></ul></li> <li><a href="http://neo.ssa.esa.int/search-for-asteroids?sum=1&des=2008TC3">2008 TC3</a> at <i>ESA–<a href="/facts/Space_Situational_Awareness_Programme/XvHuoRsX">space situational awareness</a></i> <ul><li><a href="http://neo.ssa.esa.int/search-for-asteroids?des=2008TC3&tab=eph">Ephemerides</a> · <a href="http://neo.ssa.esa.int/search-for-asteroids?des=2008TC3&tab=obs">Observations</a> · <a href="http://neo.ssa.esa.int/search-for-asteroids?des=2008TC3&tab=orbprop">Orbit</a> · <a href="http://neo.ssa.esa.int/search-for-asteroids?des=2008TC3&tab=physprops">Physical properties</a> · <a href="http://neo.ssa.esa.int/search-for-asteroids?des=2008TC3&tab=summary">Summary</a></li></ul></li> <li><a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291">2008 TC3</a> at the <i><a href="/facts/JPL_Small-Body_Database/YQQLDXng">JPL Small-Body Database</a></i> <ul><li><a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291&view=C">Close approach</a> · <a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291&view=D">Discovery</a> · <a href="https://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=3430291">Ephemeris</a> · <a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291&view=V">Orbit viewer</a> · <a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291&view=O">Orbit parameters</a> · <a href="https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3430291&view=P">Physical parameters</a></li></ul></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Jenniskens, P.; et al. (2009). "The impact and recovery of asteroid 2008 TC3". Nature. 458 (7237): 485–488. Bibcode:2009Natur.458..485J. doi:10.1038/nature07920. PMID 19325630. S2CID 7976525. <a href="/wiki/Nature_(journal)" target="_blank">/wiki/Nature_(journal)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Plait, P. (October 6, 2008). "Incoming!!!". Bad Astronomy. Archived from the original on October 7, 2008. Retrieved October 8, 2008. <a href="http://blogs.discovermagazine.com/badastronomy/2008/10/06/incoming-2/" target="_blank">http://blogs.discovermagazine.com/badastronomy/2008/10/06/incoming-2/</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Jenniskens, P.; et al. (2009). "The impact and recovery of asteroid 2008 TC3". Nature. 458 (7237): 485–488. Bibcode:2009Natur.458..485J. doi:10.1038/nature07920. PMID 19325630. S2CID 7976525. <a href="/wiki/Nature_(journal)" target="_blank">/wiki/Nature_(journal)</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Chang, K. (March 25, 2009). "Recovered Pieces of Asteroid Hold Clues to Early History". The New York Times. Archived from the original on November 13, 2013. Retrieved March 26, 2009. <a href="https://www.nytimes.com/2009/03/26/science/space/26asteroid.html?ref=us" target="_blank">https://www.nytimes.com/2009/03/26/science/space/26asteroid.html?ref=us</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Borenstein, S. (March 26, 2009). "Astronomers catch a shooting star for 1st time". ABC news. The Associated Press. Archived from the original on March 29, 2009. Retrieved September 15, 2009. <a href="https://web.archive.org/web/20090329084214/https://abcnews.go.com/Technology/Space/WireStory?id=7175837&page=2" target="_blank">https://web.archive.org/web/20090329084214/https://abcnews.go.com/Technology/Space/WireStory?id=7175837&page=2</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Roylance, F. (October 7, 2008). "Predicted meteor may have been sighted". Maryland Weather. Archived from the original on October 10, 2008. Retrieved October 8, 2008. <a href="http://weblogs.marylandweather.com/2008/10/predicted_meteor_may_have_been.html" target="_blank">http://weblogs.marylandweather.com/2008/10/predicted_meteor_may_have_been.html</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Williams, G. V. (October 6, 2008). "MPEC 2008-T50". Minor Planet Center. Archived from the original on October 9, 2008. Retrieved October 8, 2008. <a href="http://www.cfa.harvard.edu/mpec/K08/K08T50.html" target="_blank">http://www.cfa.harvard.edu/mpec/K08/K08T50.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Huntington, J. (October 7, 2008). "Small Asteroid Enters Earth's Atmosphere". eFluxMedia. Archived from the original on October 10, 2008. Retrieved October 8, 2008. <a href="https://web.archive.org/web/20081010095304/http://www.efluxmedia.com/news_Small_Asteroid_Enters_Earths_Atmosphere_26024.html" target="_blank">https://web.archive.org/web/20081010095304/http://www.efluxmedia.com/news_Small_Asteroid_Enters_Earths_Atmosphere_26024.html</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Chesley, S.; Chodas, P.; Yeomans, D. (November 4, 2008). "Asteroid 2008 TC3 Strikes Earth: Predictions and Observations Agree". Near Earth Object Program. NASA. Archived from the original on June 18, 2009. Retrieved June 18, 2009. <a href="https://web.archive.org/web/20090618045538/http://neo.jpl.nasa.gov/news/2008tc3.html" target="_blank">https://web.archive.org/web/20090618045538/http://neo.jpl.nasa.gov/news/2008tc3.html</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Roylance, F. (October 7, 2008). "Predicted meteor may have been sighted". Maryland Weather. Archived from the original on October 10, 2008. Retrieved October 8, 2008. <a href="http://weblogs.marylandweather.com/2008/10/predicted_meteor_may_have_been.html" target="_blank">http://weblogs.marylandweather.com/2008/10/predicted_meteor_may_have_been.html</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Chesley, S.; Chodas, P.; Yeomans, D. (November 4, 2008). "Asteroid 2008 TC3 Strikes Earth: Predictions and Observations Agree". Near Earth Object Program. NASA. Archived from the original on June 18, 2009. Retrieved June 18, 2009. <a href="https://web.archive.org/web/20090618045538/http://neo.jpl.nasa.gov/news/2008tc3.html" target="_blank">https://web.archive.org/web/20090618045538/http://neo.jpl.nasa.gov/news/2008tc3.html</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>"NEODys Main Risk Page". Retrieved October 8, 2008. <a href="https://newton.spacedys.com/neodys/" target="_blank">https://newton.spacedys.com/neodys/</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>"NEODys 2008 TC3 page". Retrieved October 8, 2008. <a href="https://newton.spacedys.com/neodys/index.php?pc=1.1.0&n=2008TC3" target="_blank">https://newton.spacedys.com/neodys/index.php?pc=1.1.0&n=2008TC3</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>"Astronomers predict shooting star over Sudan from space boulder". Agence France-Presse. October 6, 2008. Archived from the original on October 11, 2008. Retrieved October 8, 2008. <a href="https://web.archive.org/web/20081011054910/http://afp.google.com/article/ALeqM5jOHHF4wcyteiUj5AlJP69dIMb0yA" target="_blank">https://web.archive.org/web/20081011054910/http://afp.google.com/article/ALeqM5jOHHF4wcyteiUj5AlJP69dIMb0yA</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Simon, P. (October 8, 2008). "Weather Eye: NASA spots asteroid before annihilation". The Times. Retrieved October 8, 2008.[dead link] <a href="http://www.timesonline.co.uk/tol/news/weather/article4902427.ece" target="_blank">http://www.timesonline.co.uk/tol/news/weather/article4902427.ece</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>Javaux, G. "2008 TC3... Première détection d'un astéroïde avant son impact sur Terre... quelques heures plus tard" (in French). Retrieved September 15, 2009. Une webcam de surveillance, située sur la plage de la Mer Rouge à El Gouna en Egypte, a enregistré indirectement le flash de l'explosion qui s'est produit à environ 725 km plus au sud. <a href="http://pagesperso-orange.fr/pgj/2008_TC3.htm" target="_blank">http://pagesperso-orange.fr/pgj/2008_TC3.htm</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>"Asteroid Impact". SpaceWeather.com. October 8, 2008. Archived from the original on October 10, 2008. Retrieved October 8, 2008. <a href="http://www.spaceweather.com/archive.php?view=1&day=08&month=10&year=2008" target="_blank">http://www.spaceweather.com/archive.php?view=1&day=08&month=10&year=2008</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>"m8 HRV 200810070245". October 8, 2008. Archived from the original on October 17, 2008. Retrieved October 8, 2008. <a href="https://web.archive.org/web/20081017142511/http://www.eumetsat.int/groups/ops/documents/image/img_asteroid_impact_hrv.jpg" target="_blank">https://web.archive.org/web/20081017142511/http://www.eumetsat.int/groups/ops/documents/image/img_asteroid_impact_hrv.jpg</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>"Impact of Asteroid 2008 TC3 Confirmed". Near Earth Object Program. October 7, 2008. Archived from the original on October 10, 2008. Retrieved October 8, 2008. <a href="https://web.archive.org/web/20081010010227/http://neo.jpl.nasa.gov/news/news160.html" target="_blank">https://web.archive.org/web/20081010010227/http://neo.jpl.nasa.gov/news/news160.html</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>Borenstein, S. (October 6, 2008). "Small Asteroid Headed for Light Show Over Africa". ABC News. The Associated Press. Retrieved September 15, 2009. [dead link] <a href="https://abcnews.go.com/Technology/wireStory?id=5968166" target="_blank">https://abcnews.go.com/Technology/wireStory?id=5968166</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> <li id="fn:21"><p>Mike (October 6, 2008). "Very near NEO Meteoroid impact!". MKVH.de. Archived from the original on October 10, 2008. <a href="https://web.archive.org/web/20081010123315/http://mkvh.de/ast/serendipity/index.php?%2Farchives%2F9-Very-near-NEO-Meteoroid-impact-%21.html" target="_blank">https://web.archive.org/web/20081010123315/http://mkvh.de/ast/serendipity/index.php?%2Farchives%2F9-Very-near-NEO-Meteoroid-impact-%21.html</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></p></li> <li id="fn:22"><p>"Asteroid Update". SpaceWeather.com. October 15, 2008. Retrieved October 18, 2008. <a href="http://www.spaceweather.com/archive.php?month=10&day=15&year=2008&view=view" target="_blank">http://www.spaceweather.com/archive.php?month=10&day=15&year=2008&view=view</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></p></li> <li id="fn:23"><p>"Fireball detection". University of Western Ontario. October 15, 2008. Retrieved October 18, 2008. <a href="http://meteor.uwo.ca/~pbrown/usaf/usg282.txt" target="_blank">http://meteor.uwo.ca/~pbrown/usaf/usg282.txt</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></p></li> <li id="fn:24"><p>"Almahata Sitta". Meteoritical Bulletin Database. August 12, 2013. Retrieved August 13, 2013. <a href="http://www.lpi.usra.edu/meteor/metbull.php?code=48915" target="_blank">http://www.lpi.usra.edu/meteor/metbull.php?code=48915</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></p></li> <li id="fn:25"><p>Gebauer, S. (April 16, 2008). "Station Nr. 6. – Nubian Desert". Panoramio. Archived from the original on December 30, 2008. Retrieved June 15, 2009. <a href="https://web.archive.org/web/20081230152832/http://www.panoramio.com/photo/9417877" target="_blank">https://web.archive.org/web/20081230152832/http://www.panoramio.com/photo/9417877</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></p></li> <li id="fn:26"><p>"NASA Team Finds Riches in Meteorite Treasure Hunt". NASA. March 27, 2009. Archived from the original on March 31, 2009. Retrieved April 5, 2009. <a href="https://www.nasa.gov/topics/solarsystem/features/asteroid_treasure_hunt.html" target="_blank">https://www.nasa.gov/topics/solarsystem/features/asteroid_treasure_hunt.html</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></p></li> <li id="fn:27"><p>"Found: Pieces of meteorite spotted before impact". New Scientist (2697): 15. February 25, 2009. <a href="https://www.newscientist.com/article/mg20126974.800-found-pieces-of-meteorite-spotted-before-impact.html" target="_blank">https://www.newscientist.com/article/mg20126974.800-found-pieces-of-meteorite-spotted-before-impact.html</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></p></li> <li id="fn:28"><p>Shiga, D. (February 19, 2009). "First tracked space rock recovered after impact". New Scientist. <a href="https://www.newscientist.com/article/dn16635-first-tracked-space-rock-recovered-after-impact.html" target="_blank">https://www.newscientist.com/article/dn16635-first-tracked-space-rock-recovered-after-impact.html</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></p></li> <li id="fn:29"><p>Courtland, R. (March 25, 2009). "Meteorite hunters 'strike gold' in Sudan". New Scientist. Archived from the original on April 29, 2009. Retrieved April 4, 2009. <a href="https://www.newscientist.com/article/dn16843-meteorite-hunters-strike-gold-in-sudan.html" target="_blank">https://www.newscientist.com/article/dn16843-meteorite-hunters-strike-gold-in-sudan.html</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></p></li> <li id="fn:30"><p>Kwok, R. (March 26, 2009). "Astronomy: The Rock That Fell to Earth". Nature. 458 (7237): 401–403. doi:10.1038/458401a. PMID 19325604. <a href="https://doi.org/10.1038%2F458401a" target="_blank">https://doi.org/10.1038%2F458401a</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></p></li> <li id="fn:31"><p>Jenniskens, P.; et al. (2009). "The impact and recovery of asteroid 2008 TC3". Nature. 458 (7237): 485–488. Bibcode:2009Natur.458..485J. doi:10.1038/nature07920. PMID 19325630. S2CID 7976525. <a href="/wiki/Nature_(journal)" target="_blank">/wiki/Nature_(journal)</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></p></li> <li id="fn:32"><p>"Life's Building Blocks Found on Surprising Meteorite". Space.com. December 16, 2010. Retrieved August 13, 2013. <a href="http://www.space.com/scienceastronomy/asteroid-collision-meteoroid-amino-acids-life-101215.html" target="_blank">http://www.space.com/scienceastronomy/asteroid-collision-meteoroid-amino-acids-life-101215.html</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></p></li> <li id="fn:33"><p>Nabiei, Farhang; et al. (April 17, 2018). "A large planetary body inferred from diamond inclusions in a ureilite meteorite". Nature Communications. 9 (1). Springer Nature: 1327. Bibcode:2018NatCo...9.1327N. doi:10.1038/s41467-018-03808-6. ISSN 2041-1723. PMC 5904174. PMID 29666368. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5904174" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5904174</a> <a href="#fnref:33" class="footnote-back-ref">↩</a></p></li> <li id="fn:34"><p>Dockrill, Peter (December 22, 2020). "Meteorite Clues Point to a Huge, Unknown Object in The Early Solar System". SpaceAlert.com. Retrieved December 22, 2020. <a href="https://www.sciencealert.com/a-huge-unknown-object-once-roamed-our-ancient-solar-system-scientists-say" target="_blank">https://www.sciencealert.com/a-huge-unknown-object-once-roamed-our-ancient-solar-system-scientists-say</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></p></li> <li id="fn:35"><p>Lakdawalla, E. (September 20, 2009). "A piece of an asteroid returns to the telescope that discovered it". The Planetary Society. Archived from the original on March 4, 2012. Retrieved October 7, 2009. <a href="https://web.archive.org/web/20120304215230/http://www.planetary.org/blog/article/00002104/" target="_blank">https://web.archive.org/web/20120304215230/http://www.planetary.org/blog/article/00002104/</a> <a href="#fnref:35" class="footnote-back-ref">↩</a></p></li> </ol>