Английская Википедия:2019 UN13
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp is a small near-Earth asteroid roughly 1–2 meters in diameter. Even though the asteroid was in the night sky for months, it was fainter than the sky survey limit of apparent magnitude 24 until 29 October 2019 when the asteroid was two million km from Earth.[1] It was discovered on October 31, 2019, passing 6,200 km above Earth's surface.[2][3]
2020 QG and Шаблон:Mpl are the only asteroids known where the nominal orbit passed closer to the surface of Earth.[4] Other asteroids that passed very close to Earth include Шаблон:Mpl, 2018 UA, and Шаблон:Mpl.
An impact by Шаблон:Mp would be less significant than the 2018 LA impact.
2019 flyby
- 5 minute markers of trajectory above the earth near closest approach
Orbit changes
The close approach to Earth lifted the asteroid's aphelion point (furthest distance from the Sun) from 1.33 AU (inside the orbit of Mars) to 2.06 AU (near the edge of the inner asteroid belt). The approach changed the orbit from an Aten asteroid with a semi-major axis less than 1 AU to an Apollo asteroid with a semi-major axis greater than that of the Earth (> 1 AU).
| 2019[5] | 2020 | |
|---|---|---|
| Orbit type | Aten | Apollo |
| Perihelion (closest distance to the Sun) |
0.64 AU | 0.83 AU |
| Semi-major axis (average distance from the Sun) |
0.98 AU | 1.4 AU |
| Aphelion (furthest distance from the Sun) |
1.3 AU | 2.0 AU |
| Orbital period | 358 days | 637 days |
With the new orbit, Шаблон:Mp will come to perihelion 0.83 AU from the Sun on 15 December 2019. Without perturbations, the previous orbit would have come to perihelion in January 2020.
Future
There is a small chance the asteroid will pass Шаблон:Cvt from Mars on 26 October 2023.[5] There is also a 1 in 3 million chance the asteroid will impact Earth on 1 November 2111.[6]
See also
Шаблон:Closest non-impacting asteroids to Earth
References
External links
- MPEC 2019-V09 : 2019 UN13, Minor Planet Electronic Circular, 1 November 2019
- Catalina Sky Survey Scares-Up Tiny Earth-Grazing Halloween Asteroid, CSS, 1 November 2019
- Small asteroid paid a heavy price for almost striking Earth Thursday, EarthSky, 1 November 2019
- This small asteroid almost struck Earth on Halloween, Deseret News, 1 November 2019
- 2019 UN13 Geometry, IAWN – International Asteroid Warning Network
- Шаблон:NeoDys
- Шаблон:JPL small body
- ↑ Ошибка цитирования Неверный тег
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- ↑ Newly-discovered #asteroid C0PPEV1 Twitter message
- ↑ Go to https://cneos.jpl.nasa.gov/ca/ and for Table Settings select "Nominal distance <= 1 LD", "Past only" and sort by "CA distance nominal"
- ↑ 5,0 5,1 Ошибка цитирования Неверный тег
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