Арнеб

α Зайца
Звезда
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Наблюдательные данные
(Эпоха J2000)
Тип Желтовато-белый сверхгигант
Прямое восхождение 05ч 32м 43,80с
Склонение −17° 49′ 20,30″
Расстояние 2218 св. лет (680 пк)
Видимая звёздная величина (V) 2,58
Созвездие Заяц
Астрометрия
Лучевая скорость (Rv) 24 км/c
Собственное движение
 • прямое восхождение 3,27 mas в год
 • склонение 1,54 mas в год
Параллакс (π) 2,54 ± 0,72 mas
Абсолютная звёздная величина (V) -5,40
Спектральные характеристики
Спектральный класс F0 Ib
Показатель цвета
 • B−V 0,21
 • U−B 0,23
Физические характеристики
Масса 8−10 M⊙
Радиус 77 R⊙
Возраст 13[1] млн. лет
Температура 7350 K
Светимость 11 500 L⊙
Металличность 13,9[2]
Вращение 13 км/с
Коды в каталогах
Arneb, 11 Leporis, HR 1865, BD -17°1166, HD 36673, SAO 150547, FK5 207, HIP 25985.
Информация в базах данных
SIMBAD * alf Lep
Логотип Викиданных Информация в Викиданных ?

Арнеб — традиционное название звезды Альфа Зайца, от арабского أرنب, ’arnab — «заяц». Это — самая яркая звезда созвездия Зайца, находящаяся на расстоянии примерно 2218 свет. лет от нас.

Арнеб — старая умирающая звезда, приблизительно в 9 раз тяжелее Солнца, в 77 раз больше по диаметру и в 11 500 раз ярче. Звезда находится на стадии превращения в красный гигант. После этого звезда сбросит свои оболочки и станет тяжёлым белым карликом. Не исключен также и взрыв сверхновой с образованием нейтронной звезды.

Примечания

  1. ↑ Lyubimkov, Leonid S.; Lambert, David L.; Rostopchin, Sergey I.; Rachkovskaya, Tamara M.; Poklad, Dmitry B. Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood (англ.) // Monthly Notices of the Royal Astronomical Society : journal. — Oxford University Press, 2010. — February (vol. 402, no. 2). — P. 1369—1379. — doi:10.1111/j.1365-2966.2009.15979.x. — Bibcode: 2010MNRAS.402.1369L. — arXiv:0911.1335.
  2. ↑ Lyubimkov L. S., Korotin S. A., Lambert D. L. Oxygen abundance and the N/C versus N/O relation for AFG supergiants and bright giants (англ.) // Monthly Notices of the Royal Astronomical Society / D. Flower — OUP, 2019. — Vol. 489, Iss. 2. — P. 1533—1542. — 10 p. — ISSN 0035-8711; 1365-2966 — doi:10.1093/MNRAS/STZ2285 — arXiv:1907.04634

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