Эта Щита

η Щита
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 18ч 57м 03с
Склонение −05° 50′ 46″
Расстояние 207 св. лет (63,5 пк)
Видимая звёздная величина (V) 4.82
Созвездие Щит
Астрометрия
Лучевая скорость (Rv) −92,8 км/c
Собственное движение
 • прямое восхождение 60,77 mas в год
 • склонение −40,90 mas в год
Параллакс (π) 15.77 ± 0.89 mas
Абсолютная звёздная величина (V) +0.81
Спектральные характеристики
Спектральный класс K2 III
Показатель цвета
 • B−V 1.04
Физические характеристики
Масса 1,4 M⊙
Радиус 9,6 R⊙
Возраст 2,8 млрд лет
Температура 4710 K
Светимость 40,5 L⊙
Металличность [M/H] = ?
Вращение 3,8 км/с[1]
Коды в каталогах
Eta Scuti, Eta Sct, HR 7149, HD 175751, SAO 142838, HIP 93026
Информация в базах данных
SIMBAD * eta Sct
Логотип Викиданных Информация в Викиданных ?

η Щита (лат. η Scuti / η Sct) − звезда, которая находится в созвездии Щита на расстоянии приблизительно 207 световых лет от нас, видимая звёздная величина составляет +4,82. Это оранжевый гигант спектрального класса К. Эта звезда имеет массу в 1,4 раза больше массы Солнца, радиус — в 9,6 раз больше радиуса Солнца. Светимость звезды в 40,5 раз мощнее, чем солнечная, температура поверхности раскалена до 4710 Кельвинов. Её возраст составляет около 2,8 млрд лет[2]. η Щита приближается к Солнечной системе со скоростью 92.8 км/с.

См. также

Примечания

  1. ↑ Massarotti A., Latham D. W., Stefanik R. P., Fogel J. Rotational and radial velocities for a sample of 761 Hipparcos giants and the role of binarity (англ.) // The Astronomical Journal / J. G. III, E. Vishniac — New York City: IOP Publishing, AAS, University of Chicago Press, AIP, 2007. — Vol. 135, Iss. 1. — P. 209–231. — ISSN 0004-6256; 1538-3881 — doi:10.1088/0004-6256/135/1/209
  2. ↑ da Silva, L.; et al. (2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics, 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105 {{citation}}: Неизвестный параметр |month= игнорируется (справка)

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