is a
near-Earth asteroid
A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth. By convention, a Solar System body is a NEO if its closest approach to the Sun (perihelion) is less than 1.3 astronomical units (AU). ...
of the
Aten group, approximately in diameter. On 3 June 2014 around 17:38
UT (± 3 hours), it is crudely estimated to have passed about from Earth.
[ The asteroid was discovered on 2 June 2014 by the Mount Lemmon Survey at an apparent magnitude of 21 using a reflecting telescope.]
Uncertainty
With an observation arc of about 1 hour, the trajectory is poorly constrained and the asteroid has an uncertainty parameter
The uncertainty parameter ''U'' is introduced by the Minor Planet Center (MPC) to quantify the uncertainty of a perturbed orbital solution for a minor planet. The parameter is a logarithmic scale from 0 to 9 that measures the anticipated longit ...
of 9 making long-term predictions of the asteroids position nearly impossible. The nominal
Nominal may refer to:
Linguistics and grammar
* Nominal (linguistics), one of the parts of speech
* Nominal, the adjectival form of "noun", as in "nominal agreement" (= "noun agreement")
* Nominal sentence, a sentence without a finite verb
* Nou ...
(best fit) orbit shows that passed [ from Earth on 3 June 2014 (~12,700 km from Earth's surface).][ Since Earth has a radius of approximately 6,400 km, the asteroid did not come any closer than about 2,600 km from Earth's surface.
]
Moon
The nominal orbit shows that passed from the Moon on 4 June 2014.[ But the uncertainty region shows that the asteroid could have impacted the Moon or passed as far as .][ But it is very unlikely that the asteroid impacted the Moon.
]
See also
*
*2020 QG
2020 QG, also known by its internal designation ZTF0DxQ, is an Earth-crossing asteroid, a few meters in diameter. It belongs to the Apollo group, and passed above the surface of Earth approximately away (less than half an Earth radius) on 16 A ...
Notes
References
External links
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{{DEFAULTSORT:2014 LY21
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Minor planet object articles (unnumbered)
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20140602
Discoveries by MLS