Chelyabinsk meteorite: Difference between revisions
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|Shock = S4<ref>http://translate.google.de/translate?hl=de&sl=ru&tl=en&u=http%3A%2F%2Fria.ru%2Fscience%2F20130228%2F925165413.html</ref> |
|Shock = S4<ref>{{cite web|url=http://translate.google.de/translate?hl=de&sl=ru&tl=en&u=http%3A%2F%2Fria.ru%2Fscience%2F20130228%2F925165413.html |title=Google Übersetzer |language={{de icon}} |publisher=Translate.google.de |date= |accessdate=2013-02-28}}</ref> |
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|Weathering = [[Meteorite weathering|W0]] (pristine) |
|Weathering = [[Meteorite weathering|W0]] (pristine) |
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|Country = [[Russia]] |
|Country = [[Russia]] |
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{{see also|2013 Russian meteor event}} |
{{see also|2013 Russian meteor event}} |
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'''Chebarkul meteorite''' is the proposed name<ref name=Novosti-Chebarkul>{{ |
'''Chebarkul meteorite''' is the proposed name<ref name=Novosti-Chebarkul>{{cite web |
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| title = Russian Meteorite May Be Named Chebarkul |
| title = Russian Meteorite May Be Named Chebarkul |
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| work = RIA Novosti |
| work = RIA Novosti |
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Revision as of 16:50, 28 February 2013
| Chebarkul | |
|---|---|
 Fragments of the meteorite that was first discovered at Lake Chebarkul. The meteorite was therefore named Chebarkul. | |
| Type | Ordinary chondrite |
| Shock stage | S4[1] |
| Weathering grade | W0 (pristine) |
| Country | Russia |
| Region | Chelyabinsk Oblast |
| Coordinates | 54°57′19″N 60°19′36″E / 54.955146°N 60.326614°E |
| Observed fall | Yes |
| Fall date | 15 February 2013, 09:20 YEKT (UTC+06:00) |
| Found date | 17 February 2013 |
| TKW | TBD (53 fragments smaller than 1 cm at the moment).[2] |
| Strewn field | Yes |
 Related media on Wikimedia Commons | |
Chebarkul meteorite is the proposed name[3] for the fragments found on the ground after an asteroid entered the atmosphere of Earth and caused the Russian meteor event on February 15, 2013. The descent of the body, visible as a superbolide in the morning sky, left a series of shock waves that caused approximately 1,500 injuries, mainly by glass from shattered windows, and damage to over 3,000 buildings.[4] Similar to asteroid 2008 TC3, the meteor was observed and recorded in the atmosphere before it reached the surface of the Earth.[5]
Naming
The meteorite is named after Chebarkul, city by the Lake Chebarkul, where one of its major fragments allegedly impacted and made a hole in the ice of the lake. The fragment has yet to be found, but smaller fragments were retrieved from the ice around the hole.[6][4]
Composition and classification
The meteorite has been preliminarily classified as an ordinary chondrite. First estimates of its composition indicate about 10% of meteoric iron, as well as olivine and sulfites.[6][4]
Asteroid
The impacting asteroid started to brighten up in the general direction of the Pegasus constellation, close to the East horizon where the Sun was starting to rise.[7] The impactor belonged to the Apollo group of near-Earth asteroids.[7] The asteroid had an approximate size of 17 metres (56 ft) and a mass of 107 kg (22,000,000 lb) before it entered the denser parts of Earth's atmosphere and started to ablate.[8] At an altitude of about 30 to 50 kilometres (98,000 to 164,000 ft) the body exploded in an air burst.[9] Some fragments of the body landed on the ground.[2]
Meteorite
Although it is not yet clear if the 6-metre-wide hole in the ice of Lake Chebarkul is the result of an impact, scientists have collected 53 samples nearby. The specimens are all under 1 centimetre in size and initial laboratory analysis confirmed their meteoric origin. As of 19 February 2013, a fragment large enough to cause the hole in the ice had yet to be found.[10]
In the aftermath of the bollide air burst, a large number of small meteorites fell on areas west of Chelyabinsk, including Deputatskoye, generally at terminal velocity, about the speed of a piece of gravel dropped from a skyscraper.[11] Local residents and schoolchildren located and picked up some of the meteorites, many located in snowdrifts, by following a visible hole that had been left in the outer surface of the snow. Speculators have been active in the informal market for meteorite fragments that has rapidly emerged.[11]
As of 18 February 2013[update], some reports have surfaced of people trying to sell fake meteorites on the Internet.[12]
Gallery
-
Size comparison of the meteor size to some other objects -
The meteor's path relative to ground. -
Researcher holds the sample after finding it at Chebarkul lake -
Ural Federal University scientist Victor Grohovsky talks to press during presentation of analysis results in Ekaterinburg
References
- ^ "Google Übersetzer" (in Template:De icon). Translate.google.de. Retrieved 2013-02-28.
{{cite web}}: CS1 maint: unrecognized language (link) - ^ a b "Russian Scientists Say They Found Meteorite Fragments". New York Times. Retrieved 18 February 2013.
- ^ "Russian Meteorite May Be Named Chebarkul". RIA Novosti. Retrieved 18 February 2013.
- ^ a b c "Russische Wissenschaftler finden Teile des Meteoriten". Zeit (in German). Retrieved 18 February 2013.
- ^ "Meteorite hits Russian Urals: Fireball explosion wreaks havoc, up to 1,200 injured (PHOTOS, VIDEO)". RT. 15 February, 2013.
{{cite news}}: Check date values in:|date=(help) - ^ a b "Russische Wissenschafter fanden Fragmente des Meteoriten". Standard (in German). Retrieved 18 February 2013.
- ^ a b Zuluaga, Jorge I. (2013). "A preliminary reconstruction of the orbit of the Chelyabinsk Meteoroid". arXiv:1302.5377.
{{cite journal}}: Cite journal requires|journal=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ "Russian Meteor Blast Bigger Than Thought, NASA Says". Retrieved 19 February 2013.
- ^ "Meteorite fragments found in Russia's Urals region". Retrieved 18 February 2013.
- ^ Phil Black; Laura Smith-Spark (19 February 2013). "Russia starts cleanup after meteor strike". CNN. Retrieved 26 February 2013.
- ^ a b Kramer, Andrew E. (18 February 2013). "Russians Wade Into the Snow to Seek Treasure From the Sky". New York Times. Retrieved 20 February 2013.
- ^ "Meteorites Found, But Beware Offers to Sell". Space Policy Online. 2013-Feb-18.
{{cite web}}: Check date values in:|date=(help)
External links
- Scientists study 53 tiny meteorites from Russian fireball (Astro Bob : February 18, 2013)
- Russians Wade Into the Snow to Seek Treasure From the Sky (NY Times : February 18, 2013)
- Digging for “Chebarkul” meteorites in the snow, new pix plus an orbit (Astro Bob : February 23, 2013)