Английская Википедия:C/2014 Q2 (Lovejoy)

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Шаблон:Short description Шаблон:For Шаблон:Use dmy dates Шаблон:Infobox Comet

C/2014 Q2 (Lovejoy) is a long-period comet discovered on 17 August 2014 by Terry Lovejoy using a Шаблон:Convert Schmidt–Cassegrain telescope.[1] It was discovered at apparent magnitude 15 in the southern constellation of Puppis.[1] It is the fifth comet discovered by Terry Lovejoy. Its blue-green glow is the result of organic molecules (mostly Diatomic carbon) and water released by the comet fluorescing under the intense UV and optical light of the Sun as it passes through space.[2][3]

History

By December 2014, the comet had brightened to roughly magnitude 7.4,[4] making it a small telescope and binoculars target. By mid-December, the comet was visible to the naked eye for experienced observers with dark skies and keen eyesight.[5] On 28–29 December 2014, the comet passed 1/3° from globular cluster Messier 79.[6] In January 2015, it brightened to roughly magnitude 4,[7] and became one of the brightest comets located high in a dark sky since comet Шаблон:Nowrap (Hale-Bopp) in 1997. On 7 January 2015, the comet passed Шаблон:Convert from Earth.[8] It crossed the celestial equator on 9 January 2015, becoming better seen from the Northern Hemisphere.[9] The comet came to perihelion (closest approach to the Sun) on 30 January 2015, at a distance of Шаблон:Convert from the Sun.[10] At perihelion, its water production rate exceeded 20 metric tons per second.[2]

C/2014 Q2 originated from the Oort cloud,[2] but is not a dynamically new comet.[11] Before entering the planetary region (epoch 1950), Шаблон:Nowrap had an orbital period of about 11,000 years, with an aphelion about Шаблон:Convert from the Sun.[12] After leaving the planetary region (epoch 2050), it will have an orbital period of about 8,000 years, with aphelion of about 800 AU.[12]

The comet was observed to release 21 different organic molecules in gas, including ethanol and glycolaldehyde, a simple sugar.[2][13] The presence of organic molecules suggests that they are preserved materials synthesized in the outskirts of the solar nebula or at earlier stages of the Solar System formation.[2]

Gallery

References

Шаблон:Reflist

External links

Шаблон:Commons category

Шаблон:Comets Шаблон:2014 in space

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  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок MPEC2014-Q10 не указан текст
  2. ↑ 2,0 2,1 2,2 2,3 2,4 Шаблон:Cite journal
  3. ↑ Шаблон:Cite news
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Yoshida141207 не указан текст
  5. ↑ Ошибка цитирования Неверный тег <ref>; для сносок ST141215 не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок UT141208 не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок Yoshida не указан текст
  8. ↑ Ошибка цитирования Неверный тег <ref>; для сносок jpl-close не указан текст
  9. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPC-eph не указан текст
  10. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPEC2014-R69 не указан текст
  11. ↑ Ошибка цитирования Неверный тег <ref>; для сносок mpc не указан текст
  12. ↑ 12,0 12,1 Ошибка цитирования Неверный тег <ref>; для сносок barycenter не указан текст
  13. ↑ Шаблон:Cite news
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