Английская Википедия:2023 BU

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Шаблон:Short description Шаблон:Use dmy dates

Шаблон:Infobox planet

2023 BU is a near-Earth object that passed Шаблон:Cvt from the centerpoint of Earth around 27 January 2023 00:29 UT.[1] Since Earth's radius is about Шаблон:Cvt, it was expected to pass approximately Шаблон:Cvt from the surface of Earth over the southern tip of South America.[2] It passed at an altitude above low Earth orbit which is Шаблон:Cvt and below geostationary orbit which is Шаблон:Cvt. The asteroid is about 3–8 meters in diameter[3] and approached Earth from the night sky. It is the fourth closest non-impacting approach known to Earth (excluding Earthgrazers) after Шаблон:Mpl, Шаблон:Mpl, and Шаблон:Mpl.

Orbital details

Файл:Animation of 2023 BU around Sun.gif
Шаблон:Legend2Шаблон:·Шаблон:Legend2Шаблон:·Шаблон:Legend2

The asteroid came to perihelion (closest approach to the Sun) on 27 January 2023,[4] four hours after closest approach with Earth. 2023 BU was first imaged by Gennadiy Borisov at Nauchnyi, Crimea, on 21 January 2023 23:53 UT,[5] about five days before closest approach. It was last observed on 31 January 2023.[6]

Шаблон:Anchor

2023 BU closest Earth approach on 2023-Jan-27 00:29 UT[1]
Date and time of closest approach Earth distance
(AU) 		Sun distance
(AU) 		Velocity
wrt Earth
(km/s) 		Velocity
wrt Sun
(km/s) 		Uncertainty region
(3-sigma) 		Reference
2023-01-27 00:29 Шаблон:Convert Шаблон:Convert 9.3 35.2 ± <1 km Horizons

The gravitational effect of the 2023 Earth approach will increase the orbital period from 359 days to an estimated 425 days.[7] It will lift the perihelion and aphelion distances. The relatively low Earth encounter speed of Шаблон:Convert is a result of a low eccentricity and Earth-like orbit.

Orbital elements
Parameter Epoch Period
(p) 		Aphelion
(Q) 		Perihelion
(q) 		Semi-major axis
(a) 		Eccentricity
(e) 		Inclination
(i)
Units (days) AU (°)
Pre-flyby 2022-Oct-25[7] 358.9 1.05 0.926 0.988 0.063 2.35°
Post-flyby 2023-Feb-25[1] 425.4 1.23 0.984 1.11 0.111 3.75°

Impact assessment

There was no risk of an Earth impact during the 2023 Earth approach. Assuming the asteroid is at the larger size estimate of 8 meters in diameter, if it had entered the atmosphere it would not have reached the ground intact and would breakup around 30 km above the ground, thus representing only minimal threat to life.[8]

Impacts by objects Шаблон:Convert in diameter occur, on average, every 5 years; impacts by objects Шаблон:Convert in diameter happen, on average, once every year.[8] 2023 BU has a 1 in 17 million chance of impacting Earth on 20 January 2110.[9]

Шаблон:Anchor

History of 2023 BU closest approach uncertainties for the 3500–3600 km pass of Earth's surface
JPL SBDB
solution 		Observation arc Date and time of closest approach Uncertainty region
(3-sigma)Шаблон:Efn
JPL 1 1 day (25 obs) 2023-01-26 21:17 ± 02:22[10] ± 2,600 km[11]
JPL 2 2 days (30 obs) 2023-01-27 00:17 ± 01:05[12] ± 1,700 km[13]
JPL 3 3 days (42 obs) 2023-01-27 00:28 ± 00:10[14] ± 262 km[15]
JPL 4 3 days (39 obs) 2023-01-27 00:26 ± 00:10[16] ± 260 km[17]
JPL 5 4 days (65 obs) 2023-01-27 00:28 ± 00:02[18] ± 29 km[19]
JPL 6 4 days (61 obs) 2023-01-27 00:28 ± 00:02[20] ± 27 km[21]
JPL 9 5 days (121 obs) 2023-01-27 00:29 ± <00:01 ± 5 km[22]
JPL 11 5 days (143 obs) 2023-01-27 00:29 ± <00:01[23] ± 2 km[24]Шаблон:Efn
JPL 12 6 days (166 obs) 2023-01-27 00:29 ± <00:01[3] ± 0.3 km[25]
JPL 13 6 days (191 obs) 2023-01-27 00:29 ± <00:01 ± 0.2 km[26]
JPL 14 6 days (194 obs) 2023-01-27 00:29 ± <00:01 ± 0.19 km[27]
JPL 15 6 days (199 obs) 2023-01-27 00:29 ± <00:01 ± 0.18 km[28]
JPL 19 10 days (231 obs) 2023-01-27 00:29 ± <00:01 ± 0.15 km[29]
JPL 21 10 days (238 obs) 2023-01-27 00:29 ± <00:01 ± 0.13 km[30]

Шаблон:Closest non-impacting asteroids to Earth

See also

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:2023 in space Шаблон:Small Solar System bodies Шаблон:Portal bar Шаблон:Authority control

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  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок NASA20230125 не указан текст
  3. ↑ 3,0 3,1 Archive JPL 12 CNEOS Close Approaches
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Perihelion не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPEC-2023-B72 не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  7. ↑ 7,0 7,1 Ошибка цитирования Неверный тег <ref>; для сносок Horizons-epoch не указан текст
  8. ↑ 8,0 8,1 Ошибка цитирования Неверный тег <ref>; для сносок Earth-impact не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок sentry не указан текст
  10. ↑ Archive JPL 1 SBDB
  11. ↑ Archive JPL 1 Horizons
  12. ↑ Archive JPL 2 CNEOS Close Approaches
  13. ↑ Archive JPL 2 Horizons
  14. ↑ Archive JPL 3 CNEOS Close Approaches
  15. ↑ Archive JPL 3 Horizons
  16. ↑ Archive JPL 4 CNEOS Close Approaches
  17. ↑ Archive JPL 4 Horizons
  18. ↑ Archive JPL 5 CNEOS Close Approaches
  19. ↑ Archive JPL 5 Horizons
  20. ↑ Archive JPL 6 CNEOS Close Approaches
  21. ↑ Archive JPL 6 Horizons
  22. ↑ Archive JPL 9 Horizons
  23. ↑ Archive JPL 11 CNEOS Close Approaches
  24. ↑ Archive JPL 11 Horizons
  25. ↑ Archive JPL 12 Horizons
  26. ↑ Archive JPL 13 Horizons
  27. ↑ Archive JPL 14 Horizons
  28. ↑ Archive JPL 15 Horizons
  29. ↑ Archive JPL 19 Horizons
  30. ↑ Archive JPL 21 Horizons
Источник — http://wikihandbk.com/ruwiki/index.php?title=Английская_Википедия:2023_BU&oldid=12825838