1 Pegasi

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1 Pegasi
Лучевая скорость (Rv)  км/c
Собственное движение
 • прямое восхождение  mas в год
 • склонение  mas в год

Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end

1 Pegasi (1 Peg) is a triple star[1] system in the constellation Pegasus, located approximately 156 light years away from the Sun based on parallax.[2] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.09.[3] The system is moving closer to the Earth with a heliocentric radial velocity of −11 km/s.[4]

The primary component is a giant with a stellar classification of K1III,[5] a star that has exhausted the hydrogen supply at its core and evolved away from the main sequence. It has 1.57[6] times the mass of the Sun and has expanded to 12[6] times the Sun's radius. The star is radiating 72[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,600 K.[8]

There are several companions in addition to the primary. The brightest, component B, is a magnitude 9.3, K-type main-sequence star with a class of K0 V orbiting at an angular separation of 36.6" from the primary; it is itself a single-lined spectroscopic binary with an orbital period of Шаблон:Convert/± and eccentricity of 0,290 ± 0,022.[9] Visual companions C, with magnitude 12.9 and separation 64.7", and D, with magnitude 9.6 and separation 5.3", have been reported.[10]


  1. Eggleton, P. P.; Tokovinin, A. A. (2008). “A catalogue of multiplicity among bright stellar systems”. Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. DOI:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976. Vizier catalog entry
  2. Ошибка цитирования Неверный тег <ref>; для сносок vanLeeuwen2007 не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок Ducati2002 не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок Bakos1974 не указан текст
  5. Ошибка цитирования Неверный тег <ref>; для сносок Hoffleit1991 не указан текст
  6. а б Ошибка цитирования Неверный тег <ref>; для сносок AllendePrieto не указан текст
  7. Ошибка цитирования Неверный тег <ref>; для сносок XHIP не указан текст
  8. Ошибка цитирования Неверный тег <ref>; для сносок Gontcharov2008 не указан текст
  9. Griffin, R. F. (February 1987). “Spectroscopic binary orbits from photoelectric radial velocities. Paper 72: 1 Pegasi B”. The Observatory. 107: 1—5. Bibcode:1987Obs...107....1G.
  10. Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). “The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog”. The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. DOI:10.1086/323920. Vizier catalog entry

Шаблон:Stars of Pegasus