干旱区生态环境知识资源中心(Arid): Where Did They Come From, Where Did They Go: Grazing Fireballs

Arid

DOI	10.3847/1538-3881/ab8002
	Where Did They Come From, Where Did They Go: Grazing Fireballs
	Shober, Patrick M.; Jansen-Sturgeon, Trent; Sansom, Eleanor K.; Devillepoix, Hadrien A. R.; Towner, Martin C.; Bland, Phil A.; Cupak, Martin; Howie, Robert M.; Hartig, Benjamin A. D.
通讯作者	Shober, Patrick M.
来源期刊	ASTRONOMICAL JOURNAL
ISSN	0004-6256
EISSN	1538-3881
出版年	2020
卷号	159 期号:5
英文摘要	For centuries extremely long grazing fireball displays have fascinated observers and inspired people to ponder about their origins. The Desert Fireball Network is the largest single fireball network in the world, covering about one third of Australian skies. This expansive size has enabled us to capture a majority of the atmospheric trajectory of a spectacular grazing event that lasted over 90 s, penetrated as deep as similar to 58.5 km, and traveled over 1300 km through the atmosphere before exiting back into interplanetary space. Based on our triangulation and dynamic analyses of the event, we have estimated the initial mass to be at least 60 kg, which would correspond to a 30 cm object given a chondritic density (3500 kg m(-3)). However, this initial mass estimate is likely a lower bound, considering the minimal deceleration observed in the luminous phase. The most intriguing quality of this close encounter is that the meteoroid originated from an Apollo-type orbit and was inserted into a Jupiter-family comet (JFC) orbit due to the net energy gained during the close encounter with Earth. Based on numerical simulations, the meteoroid will likely spend similar to 200 kyr on a JFC orbit and have numerous encounters with Jupiter, the first of which will occur in 2025 January-March. Eventually the meteoroid will likely be ejected from the solar system or be flung into a trans-Neptunian orbit.
类型	Article
语种	英语
国家	Australia
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000525635700001
WOS关键词	JUPITER-FAMILY COMETS ; FRAGMENTATION RECORD ; PEEKSKILL METEORITE ; DAYLIGHT FIREBALL ; ATMOSPHERIC PATH ; AUGUST 10 ; ORBIT ; ORIGIN ; DISTRIBUTIONS ; POPULATION
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314111
作者单位	Curtin Univ, Sch Earth & Planetary Sci, SSTC, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Shober, Patrick M.,Jansen-Sturgeon, Trent,Sansom, Eleanor K.,et al. Where Did They Come From, Where Did They Go: Grazing Fireballs[J],2020,159(5).
APA	Shober, Patrick M..,Jansen-Sturgeon, Trent.,Sansom, Eleanor K..,Devillepoix, Hadrien A. R..,Towner, Martin C..,...&Hartig, Benjamin A. D..(2020).Where Did They Come From, Where Did They Go: Grazing Fireballs.ASTRONOMICAL JOURNAL,159(5).
MLA	Shober, Patrick M.,et al."Where Did They Come From, Where Did They Go: Grazing Fireballs".ASTRONOMICAL JOURNAL 159.5(2020).