Английская Википедия:Epsilon Equulei

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end

Epsilon Equulei, Latinized from ε Equulei, is a star system of apparent magnitude +5.23[1] in the constellation of Equuleus. It is located 180 light years away from the Solar System, based on its parallax.[2]

Star system

Two stars make up the brighter part of the Epsilon Equulei star system. They are called Epsilon Equulei A and B and are main-sequence stars of spectral type of F5 and F6, respectively.[3] The orbital period of this binary is about 101.5 years. Although the average separation between the two stars is about Шаблон:Val, the orbit is remarkably eccentric, at 0.705. The two stars passed their periastron in 1920.[4] Finally, it is thought that Epsilon Equulei A may be, in turn, a spectroscopic binary. The orbital period of the latter would be 2.03133 days.[5]

Approximately 10 arcseconds away from A and B is Epsilon Equulei C (HIP 103571), with an apparent magnitude of 7.35. It is another F-type main-sequence stars, and based on its similar distance and proper motion to A and B, it is assumed to be associated.[6]

The Epsilon Equulei system is thought to be approximately 1.5 billion years old.[7]

References

Шаблон:Reflist

Шаблон:Stars of Equuleus

  1. Ошибка цитирования Неверный тег <ref>; для сносок SIMBAD не указан текст
  2. Ошибка цитирования Неверный тег <ref>; для сносок HIP не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок Beavers не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок ORB6 не указан текст
  5. Шаблон:Cite journal
  6. Шаблон:Cite simbad
  7. Шаблон:Cite journal