Английская Википедия:7P/Pons–Winnecke
Шаблон:Short description Шаблон:Infobox comet
| Perihelion distance at different epochs[1] | |||||||
| Epoch | Perihelion (AU) | ||||||
|---|---|---|---|---|---|---|---|
| 1819 | 0.77 | ||||||
| 1875 | 0.83 | ||||||
| 1886 | 0.89 | ||||||
| 1898 | 0.92 | ||||||
| 1909 | 0.97 | ||||||
| 1921 | 1.04 | ||||||
| 1933 | 1.10 | ||||||
| 1989 | 1.26 | ||||||
| 2027 | 1.13 | ||||||
| 2039 | 0.982 | ||||||
| 2062 | 0.847 | ||||||
7P/Pons–Winnecke (also known as Comet Pons–Winnecke) is a periodic Jupiter-family comet with a six-year orbit. Early calculations for the 1921 apparition suggested that the orbit of the comet might collide with Earth in June, but observations on 10 April ruled out an impact.[2] It made a very close approach to Earth in June 1927.[3] The outward migration of perihelion created impressive meteor showers in 1916, 1921 and 1927.[4]
The next perihelion passage is 25 August 2027[5] when the comet will have a solar elongation of 63 degrees. The last perihelion passage was 27 May 2021 when the comet had a solar elongation of 107 degrees at approximately apparent magnitude 11.[6] It passed Шаблон:Convert from Earth on 12 June 2021. Before that it came to perihelion on 30 January 2015[6] with a solar elongation of 24 degrees.[7]
Jean Louis Pons (Marseille) originally discovered the comet on 12 June 1819, it was later rediscovered by Friedrich August Theodor Winnecke (Bonn) on 9 March 1858. It is the parent body of the June Bootids of late June.
7P has an orbital period of 6.3 years. It currently has a perihelion of 1.2 AU (outside the orbit of Earth) and an aphelion of 5.6 AU (past the orbit of Jupiter). It passed within Шаблон:Convert of Earth in June 1927, and Шаблон:Convert in 1939;[8] but it will not come as close in the 21st century. A close approach to Jupiter in July 2037[8] will drop perihelion to 0.982 AU, and by 2062 perihelion will be further reduced to 0.85 AU.[1]
| Date & 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 |
|---|---|---|---|---|---|---|
| 2062-Jun-12 18:25 ± 10 min | Шаблон:Convert | Шаблон:Convert | 16.3 | 42.5 | ± 312 km | Horizons |
The comet nucleus is estimated at about 5.2 km in diameter.[8]
Proposed exploration
The Jet Propulsion Laboratory proposed a flyby of the comet with a flight spare of Mariner 4 with the closest approach taking place in 1969.[9] The probe was instead used for a Venus flyby as Mariner 5.[9]
References
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- Elements and Ephemeris for 7P/Pons-Winnecke – Minor Planet Center
- 7P/Pons-Winnecke – Seiichi Yoshida @ aerith.net
- 7P – Gary W. Kronk's Cometography
- article on the nuclei of 7P, 14P, and 92P
Шаблон:PeriodicComets Navigator Шаблон:Comets
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
<ref>; для сносокKinoshitaне указан текст - ↑ Popular Science July 1921
- ↑ Шаблон:Cite web
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокkronkне указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокHorizons2027не указан текст - ↑ 6,0 6,1 Ошибка цитирования Неверный тег
<ref>; для сносокYoshidaне указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMPC-ephне указан текст - ↑ 8,0 8,1 8,2 8,3 Ошибка цитирования Неверный тег
<ref>; для сносокjpldataне указан текст - ↑ 9,0 9,1 Шаблон:Cite book
- Английская Википедия
- Periodic comets
- Numbered comets
- Near-Earth comets
- Meteor shower progenitors
- Comets in 2015
- Comets in 2021
- Astronomical objects discovered in 1819
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях
