Английская Википедия:70 Pegasi

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

70 Pegasi is a binary star[1] system in the northern constellation Pegasus. It is a faint star, visible to the naked eye under good seeing conditions, with an apparent visual magnitude of 4.56.[2] The measured annual parallax shift measured from Earth's orbit is 18.65 mas,[3] yielding a distance estimate of around 175 light years. The visual magnitude of the star is diminished by an extinction of Шаблон:Val due to interstellar dust. It is moving closer to the Sun with a radial velocity of −17 km/s.[4]

This is a single-lined spectroscopic binary with an orbital period of Шаблон:Convert and a high eccentricity of 0.713.[1] The visible component has a stellar classification of G8 IIIa,[5] indicating it is an evolved G-type giant star. It is a probable red clump star, which would mean it is generating energy through helium fusion at its core.[6] The star has 2.5 times the mass of the Sun and has expanded to more than 8 times the Sun's radius. It is radiating about 48 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,032 K.[4]

The secondary is most likely a low mass main sequence star with no more than 0.4 times the mass of the Sun.[1]

References

Шаблон:Reflist

Шаблон:Stars of Pegasus

  1. 1,0 1,1 1,2 Ошибка цитирования Неверный тег <ref>; для сносок Griffin2009 не указан текст
  2. Ошибка цитирования Неверный тег <ref>; для сносок Luck2015 не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок vanLeeuwen2007 не указан текст
  4. 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок Maldonado2013 не указан текст
  5. Ошибка цитирования Неверный тег <ref>; для сносок perkins1989 не указан текст
  6. Ошибка цитирования Неверный тег <ref>; для сносок Puzeras2010 не указан текст