干旱区生态环境知识资源中心(Arid): Identification of a Minimoon Fireball

Arid

DOI	10.3847/1538-3881/ab3f2d
	Identification of a Minimoon Fireball
	Shober, P. M.; Jansen-Sturgeon, T.; Sansom, E. K.; Devillepoix, H. A. R.; Bland, P. A.; Cupak, Martin; Towner, Martin C.; Howie, Robert M.; Hartig, Benjamin A. D.
通讯作者	Shober, P. M.
来源期刊	ASTRONOMICAL JOURNAL
ISSN	0004-6256
EISSN	1538-3881
出版年	2019
卷号	158 期号:5
英文摘要	Objects gravitationally captured by the Earth-Moon system are commonly called temporarily captured orbiters (TCOs), natural Earth satellites, or minimoons. TCOs are a crucially important subpopulation of near-Earth objects (NEOs) to understand because they are the easiest targets for future sample-return, redirection, or asteroid mining missions. Only one TCO has ever been observed telescopically, 2006 RH120, and it orbited Earth for about 11 months. Additionally, only one TCO fireball has ever been observed prior to this study. We present our observations of an extremely slow fireball (codename DN160822_03) with an initial velocity of around 11.0 km s(-1) that was detected by six of the high-resolution digital fireball observatories located in the South Australian region of the Desert Fireball Network. Due to the inherent dynamics of the system, the probability of the meteoroid being temporarily captured before impact is extremely sensitive to its' initial velocity. We examine the sensitivity of the fireball's orbital history to the chosen triangulation method. We use the numerical integrator REBOUND to assess particle histories and assess the statistical origin of DN160822_03. From our integrations we have found that the most probable capture time, velocity, semimajor axis, NEO group, and capture mechanism vary annually for this event. Most particles show that there is an increased capture probability during Earth's aphelion and perihelion. In the future, events like these may be detected ahead of time using telescopes like the Large Synoptic Survey Telescope, and the pre-atmospheric trajectory can be verified.
英文关键词	meteorites, meteors, meteoroids planets and satellites: general
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:000503507000014
WOS关键词	SATELLITE CAPTURE ; NATURAL SATELLITES ; TRAJECTORIES ; METEORITE
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310417
作者单位	Curtin Univ, Sch Earth & Planetary Sci, Space Sci & Technol Ctr, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Shober, P. M.,Jansen-Sturgeon, T.,Sansom, E. K.,et al. Identification of a Minimoon Fireball[J],2019,158(5).
APA	Shober, P. M..,Jansen-Sturgeon, T..,Sansom, E. K..,Devillepoix, H. A. R..,Bland, P. A..,...&Hartig, Benjamin A. D..(2019).Identification of a Minimoon Fireball.ASTRONOMICAL JOURNAL,158(5).
MLA	Shober, P. M.,et al."Identification of a Minimoon Fireball".ASTRONOMICAL JOURNAL 158.5(2019).