Arid
DOI10.1111/j.1945-5100.2011.01321.x
The Bunburra Rockhole meteorite fall in SW Australia: fireball trajectory, luminosity, dynamics, orbit, and impact position from photographic and photoelectric records
Spurny, Pavel1; Bland, Philip A.2,3,4; Shrbeny, Lukas1; Borovicka, Jiri1; Ceplecha, Zdenek1; Singelton, Andrew5; Bevan, Alex W. R.6; Vaughan, David; Towner, Martin C.2; McClafferty, Terence P.7; Toumi, Ralf5; Deacon, Geoff3
通讯作者Spurny, Pavel
来源期刊METEORITICS & PLANETARY SCIENCE
ISSN1086-9379
EISSN1945-5100
出版年2012
卷号47期号:2页码:163-185
英文摘要

We report an analysis of the first instrumentally observed meteorite fall in Australia, which was recorded photographically and photoelectrically by two eastern stations of the Desert Fireball Network (DFN) on July 20, 2007. The meteoroid with an initial mass of 22 kg entered the atmosphere with a low speed of 13.36 km s(-1) and began a luminous trajectory at an altitude of 62.83 km. In maximum, it reached -9.6 absolute magnitude and terminated after a 5.7 s and 64.7 km long flight at an altitude of 29.59 km with a speed of 5.8 km s(-1). The angle of the atmospheric trajectory to the Earths surface was 30.9 degrees. The first organized search took place in October 2008 and the first meteorite (150 g) was found 97 m southward from the predicted central line at the end of the first day of searching (October 3, 2008). The second stone (174 g) was recovered 39 m northward from the central line, both exactly in the predicted mass limits. During the second expedition in February 2009, a third fragment of 14.9 g was found again very close (100 m) from the predicted position. Total recovered mass is 339 g. The meteorite was designated Bunburra Rockhole (BR) after a nearby landscape structure. This first DFN sample is an igneous achondrite. Initial petrography indicated that BR was a brecciated eucrite but detailed analyses proved that BR is not a typical eucrite, but an anomalous basaltic meteorite (Bland etal. 2009). BR was delivered from an unusual, Aten type orbit (a < 1 AU) where virtually the entire orbit was contained within Earths orbit. BR is the first achondrite fall with a known orbit and it is one of the most precise orbits ever calculated for a meteorite dropping fireball.


类型Article
语种英语
国家Czech Republic ; England ; Australia
收录类别SCI-E
WOS记录号WOS:000299931200001
WOS关键词RECOVERY ; VIDEO ; FRAGMENTATION ; RADIATION ; BODIES ; MODEL ; MASS
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174050
作者单位1.Acad Sci CR, Astron Inst, Ondrejov 25165, Czech Republic;
2.Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, IARC, London SW7 2AZ, England;
3.Nat Hist Museum, Dept Mineral, IARC, London SW7 5BD, England;
4.Curtin Univ, Dept Appl Geol, Perth, WA 6845, Australia;
5.Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England;
6.Western Australian Museum, Dept Earth & Planetary Sci, Welshpool Dc, WA 6986, Australia;
7.Curtin Univ, Off Res & Dev, Perth, WA 6845, Australia
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GB/T 7714
Spurny, Pavel,Bland, Philip A.,Shrbeny, Lukas,et al. The Bunburra Rockhole meteorite fall in SW Australia: fireball trajectory, luminosity, dynamics, orbit, and impact position from photographic and photoelectric records[J],2012,47(2):163-185.
APA Spurny, Pavel.,Bland, Philip A..,Shrbeny, Lukas.,Borovicka, Jiri.,Ceplecha, Zdenek.,...&Deacon, Geoff.(2012).The Bunburra Rockhole meteorite fall in SW Australia: fireball trajectory, luminosity, dynamics, orbit, and impact position from photographic and photoelectric records.METEORITICS & PLANETARY SCIENCE,47(2),163-185.
MLA Spurny, Pavel,et al."The Bunburra Rockhole meteorite fall in SW Australia: fireball trajectory, luminosity, dynamics, orbit, and impact position from photographic and photoelectric records".METEORITICS & PLANETARY SCIENCE 47.2(2012):163-185.
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