Английская Википедия:2023 CX1

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Шаблон:Short description

Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp, initially known under temporary designation Sar2667, was a metre-sized asteroid or meteoroid that entered Earth's atmosphere on 13 February 2023 02:59 UTC and disintegrated as a meteor over the coast of Normandy, France along the English Channel.[1] It was discovered less than seven hours before impact, by Hungarian astronomer Krisztián Sárneczky at Konkoly Observatory's Piszkéstető Station in the Mátra Mountains, Hungary.[2][3] Шаблон:Mp is the seventh asteroid discovered before impacting Earth and successfully predicted, and the third of those for which meteorites have been recovered. Before it impacted, Шаблон:Mp was a near-Earth asteroid on an Earth-crossing Apollo-type orbit.[4]

Discovery

During a routine search for near-Earth objects with his Шаблон:Convert Schmidt telescope,[5] Krisztián Sárneczky first imaged Шаблон:Mp on 12 February 2023 at 20:18:07 UTC, when it was already less than Шаблон:Cvt from Earth and inside the orbit of the Moon at 0.61 lunar distances.[2][6] At discovery, the asteroid had an apparent magnitude of 19.4 and moved quickly in the northern hemisphere sky, at an angular rate of 14 arcseconds per minute and a radial velocity of Шаблон:Cvt towards Earth.[6] Sárneczky immediately recognized it was a near-Earth object, but only realized it was on course for impact with Earth when he reobserved it half an hour later.[3] Sárneczky gave the object the temporary designation Sar2667 and reported the discovery to the Minor Planet Center's (MPC's) Near-Earth Object Confirmation Page at 20:49 UTC, calling for further follow-up from other observatories around the world.[7] Astronomers at Višnjan Observatory in Tičan, Croatia observed the asteroid starting at 21:03 UTC and confirmed that it was headed for impact with Earth.[2][8]

The European Space Agency took notice of the asteroid's impending impact and alerted the public through social media.[5] Astronomers around the world continuously observed the asteroid to refine its trajectory as it approached Earth and its impact location.[7][6] The asteroid reached a peak brightness of magnitude 13 (about the brightness of Pluto) right before it entered Earth's shadow at around 02:50 UTC. It then faded dramatically and became invisible until impact.[4][7] The asteroid was last observed on 13 February 2023 02:52:07 UTC by Jost Jahn at the SATINO Remote Observatory in Haute Provence, France, just two minutes after it entered Earth's shadow and seven minutes before it impacted.[4][6] At the time of that last observation, the asteroid had faded from magnitude 13 to 16 and moved extremely quickly at an angular rate of 1.7 degrees per minute, at a distance of approximately Шаблон:Cvt from Earth's center (Шаблон:Cvt altitudeШаблон:Efn).[9]

On 13 February 2023 04:13 UTC (one hour after the impact), the object received from the MPC the official minor planet provisional designation Шаблон:Mp. At least 20 observatories observed Шаблон:Mp and submitted astrometry to the MPC before impact, with over 300 astrometric positions recorded in total.[2][4]

Impact

Файл:2023 CX1 ground track UKMON.png
Flight path of Шаблон:Mp plotted on a map, starting from the English Channel and ending at the coast of Normandy, France to the east.

At 02:59:21 UTC (local time 03:59:21 CET), Шаблон:Mp entered the atmosphere at a velocity of Шаблон:Cvt with an inclination 40–50° relative to the vertical.[8][10] As the meteoroid travelled eastward over the English Channel to the coast of Normandy, France, it experienced significant atmospheric drag and began burning up as a bright meteor at an altitude of Шаблон:Cvt.[8][11] It was seen by witnesses from France, Great Britain, Belgium, Netherlands, and Germany.[5][12] The meteor began fragmenting at an altitude of Шаблон:Cvt and then completely broke apart at Шаблон:Cvt, producing a bright flash due to the rapid vaporization of its fragments.[11] In the process, the meteor released a great amount of kinetic energy. That produced a shock wave, which was heard by some witnesses and was detected by French seismographs.[10] The meteor disappeared at an altitude of Шаблон:Cvt, after which its resulting meteorites continued falling in dark flight.[11] Over 80 witness reports of the meteor were submitted to the International Meteor Organization (IMO).[12]

Файл:Meteorite Saint-Pierre-le-Viger Loïs Leblanc-Rappe MNHN Minéralogie.jpg
The 94g meteorite found by Loïs Leblanc

Upon breakup, Шаблон:Mp dropped meteorites over the Normandy region and produced a strewn field spanning from Dieppe to Doudeville.[10] Guided by Peter Jenniskens, researchers and citizen scientists of the Fireball Recovery and Interplanetary Observation Network (Шаблон:Interlanguage link) immediately began a coordinated search effort in the expected meteorite fall area.[13] On 15 February 2023 15:47 UTC (local time 16:47 CET), FRIPON member and art student Loïs Leblanc found the first meteorite of Шаблон:Mp in a field located in the commune of Saint-Pierre-le-Viger.[13] The meteorite weighed about Шаблон:Cvt[14] and is described as a "dark stone."[13][15] By March 2023, over 20 additional meteorites were recovered, with masses ranging Шаблон:Cvt.[14] The IMO estimates that Шаблон:Mp could have dropped only one large meteorite up to ~Шаблон:Cvt in mass, plus an uncertain number of smaller meteorites up to several tens of grams each.[1][11] The largest meteorite is expected to have landed near the commune of Vénestanville.[11]

Шаблон:Mp is the seventh asteroid discovered before being successfully predicted to impact Earth, and also the third whose meteorites were collected after its predicted impact.[1][13] It is Sárneczky's second discovery of an impacting asteroid, after Шаблон:Mpl which he discovered a year prior in March 2022.[5]

Orbit

Prior to impact, Шаблон:Mp was on an Apollo-type orbit that crossed the orbits of Earth and Mars.[16] It orbited the Sun at an average distance of Шаблон:Convert, varying from 0.92 AU at perihelion to 2.34 AU at aphelion due to its eccentric orbit.[16] The orbit had a low inclination of 3.4° with respect to the ecliptic and an orbital period of 2.08 years. The asteroid last passed perihelion on 13 February 2021 and impacted Earth before it was set to make its next perihelion on 15 March 2023.[17][16]

The last time Шаблон:Mp made a close approach to Earth was around 7 (± 1) June 2000, when it passed around Шаблон:Convert from the planet.[18] Before that, Шаблон:Mp had made several distant close approaches with Earth and Mars during the 1900s, though it probably never approached within Шаблон:Convert from these planets.[18]

See also

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:2023 in space Шаблон:Modern impact events Шаблон:Small Solar System bodies Шаблон:Authority control

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  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок EarthSky не указан текст
  2. ↑ 2,0 2,1 2,2 2,3 Ошибка цитирования Неверный тег <ref>; для сносок MPEC-2023-C103 не указан текст
  3. ↑ 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок Space-20230213b не указан текст
  4. ↑ 4,0 4,1 4,2 4,3 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  5. ↑ 5,0 5,1 5,2 5,3 Ошибка цитирования Неверный тег <ref>; для сносок Space-20230213a не указан текст
  6. ↑ 6,0 6,1 6,2 6,3 Ошибка цитирования Неверный тег <ref>; для сносок Horizons-ephem не указан текст
  7. ↑ 7,0 7,1 7,2 Ошибка цитирования Неверный тег <ref>; для сносок ESA-20230213 не указан текст
  8. ↑ 8,0 8,1 8,2 Ошибка цитирования Неверный тег <ref>; для сносок IMO-20230212b не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Horizons-lastobs не указан текст
  10. ↑ 10,0 10,1 10,2 Ошибка цитирования Неверный тег <ref>; для сносок FRIPON-20230214 не указан текст
  11. ↑ 11,0 11,1 11,2 11,3 11,4 Ошибка цитирования Неверный тег <ref>; для сносок IMO-20230215 не указан текст
  12. ↑ 12,0 12,1 Ошибка цитирования Неверный тег <ref>; для сносок IMO-937-2023 не указан текст
  13. ↑ 13,0 13,1 13,2 13,3 Ошибка цитирования Неверный тег <ref>; для сносок FRIPON-20230215 не указан текст
  14. ↑ 14,0 14,1 Ошибка цитирования Неверный тег <ref>; для сносок CBET5230 не указан текст
  15. ↑ Ошибка цитирования Неверный тег <ref>; для сносок S&T-20230217 не указан текст
  16. ↑ 16,0 16,1 16,2 Ошибка цитирования Неверный тег <ref>; для сносок Horizons-epoch не указан текст
  17. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Perihelion не указан текст
  18. ↑ 18,0 18,1 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
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