Английская Википедия:2019 PG1

Материал из Онлайн справочника
Версия от 10:23, 24 декабря 2023; EducationBot (обсуждение | вклад) (Новая страница: «{{Английская Википедия/Панель перехода}} {{DISPLAYTITLE:{{mp|2019 PG|1}}}} {{Use dmy dates|date=November 2020}} {{Infobox planet | minorplanet = yes | name = {{mp|2019 PG|1}} | background = #FFC2E0 | image = | image_size = | caption = | discovery_ref =  <ref name="MPC-object" /> | discoverer = Pan-STARRS | discovery_site = Haleakala Observatory|Haleak...»)
(разн.) ← Предыдущая версия | Текущая версия (разн.) | Следующая версия → (разн.)
Перейти к навигацииПерейти к поиску

Шаблон:Use dmy dates Шаблон:Infobox planet

Шаблон:Mp is a sub-kilometer near-Earth object and potentially hazardous asteroid of the Apollo class, discovered by Pan-STARRS on 8 August 2019,[1] two weeks after it passed Earth at 62 LD.[2] With an observation arc of 103 days, Earth approach dates become divergent by 2042 as the date of closest approach in 2042 has an uncertainty of ±3 days.

Orbit and classification

Файл:Size of Apophis asteroid.png
Шаблон:Mp has an estimated mean-diameter of 200–450 meters, similar to the Eiffel Tower.

Шаблон:Mp belongs to the Apollo asteroids, which cross the orbit of Earth. Apollos are the largest group of near-Earth objects with about 10 thousand known members. It orbits the Sun at a distance of 0.999–3.92 AU once every 3 years and 10 months (1,407 days; semi-major axis of 2.46 AU). Its orbit has an eccentricity of 0.59 and an inclination of 20° with respect to the ecliptic.[2] With an uncertainty parameter of 4 and 5, respectively, long term predictions of the object's trajectory are imprecise.[1][2]

Шаблон:Mp is also a potentially hazardous asteroid (PHA) because its minimum orbit intersection distance (MOID) is less than 0.05 AU and its diameter is greater than 150 meters. The Earth-MOID is Шаблон:Convert.[2]

Close approaches

In July 1988, Шаблон:Mp made an Earth flyby of between Шаблон:Convert.[2] On 24 July 2019, two weeks before its official discovery observation by Pan-STARRS, it passed Earth at Шаблон:Convert.[2] In June 2065 it should pass within Шаблон:Convert. In July 2111 a possibly notable close-approach to Earth may occur, but the asteroid is expected to pass Шаблон:Convert from Earth and has an uncertainty region of about ±15 million km.[2]Шаблон:Efn The asteroid is not listed on the Sentry Risk Table as the nonlinearities along the line of variations do not intersect where Earth will be.

Diameter and albedo

According to NASA's Center for Near-Earth Object Studies, it has a mean-diameter of Шаблон:Convert, based on an absolute magnitude of 20.6 and an assumed albedo of 0.14.[3] Based on its brightness and the way it reflects light, the object's diameter may vary as much as 200–450 meters, depending on whether its surface is of a stony or a carbonaceous composition, which correspond to an albedo of 0.25 and 0.05, respectively.[3][4]

It has been estimated that asteroids of similar size such as 99942 Apophis could produce up to 10 million casualties if they hit populated areas.[5]

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:Small Solar System bodies Шаблон:2019 in space

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  2. ↑ 2,0 2,1 2,2 2,3 2,4 2,5 2,6 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  3. ↑ 3,0 3,1 Ошибка цитирования Неверный тег <ref>; для сносок h не указан текст
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок spacereference не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Bailey-2007 не указан текст
Источник — http://wikihandbk.com/ruwiki/index.php?title=Английская_Википедия:2019_PG1&oldid=12791896