Английская Википедия:177P/Barnard

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Шаблон:Infobox Comet

Comet 177P/Barnard, also known as Barnard 2, is a periodic comet with an orbital period of 122 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).[1] It orbits near the ecliptic plane and has aphelion near the Kuiper cliff at Шаблон:Convert.

The comet, also designated P/2006 M3, was discovered by Edward Emerson Barnard on June 24, 1889, and was re-discovered after 116 years.[2] On July 19, 2006, 177P came within Шаблон:Convert of Earth.[1][3] From late July through September 2006 it was slightly brighter than expected at 8th magnitude[4] in the constellations Hercules and then Draco. Perihelion was August 28, 2006. It was last observed in December 2006 when it was about Шаблон:Convert from the Sun.[1]

The only numbered comets with an orbital period longer than 177P/Barnard are: 153P/Ikeya–Zhang (365 years), 273P/Pons–Gambart (188 years), 35P/Herschel–Rigollet (155 years), and 109P/Swift-Tuttle (133 years).

Of Barnard's other two periodic comets, the first, D/1884 O1 (Barnard 1) was last seen on November 20, 1884, and is thought to have disintegrated. The last, 206P/Barnard-Boattini marked the beginning of a new era in cometary astronomy, as it was the first to be discovered by photography. It was a lost comet after 1892, until accidentally rediscovered on October 7, 2008, by Andrea Boattini.

References

Шаблон:Reflist

External links

Шаблон:Comets Шаблон:PeriodicComets Navigator

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  1. ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  2. ↑ Шаблон:Cite web
  3. ↑ Шаблон:Cite web
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Yoshida не указан текст
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