HD 4313

HD 4313
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Тип Одиночная звезда
Прямое восхождение 00ч 45м 40,36с
Склонение +07° 50′ 42,08″
Расстояние 447 св. лет (137 пк) [1]
Видимая звёздная величина (V) 7,83 [1]
Созвездие Рыбы
Астрометрия
Лучевая скорость (Rv) 14,67 ± 0,13 км/с[3]
Собственное движение
 • прямое восхождение −4,86 [2] mas в год
 • склонение 6,60 [2] mas в год
Параллакс (π) 7,61 ± 0,94 [2] mas
Абсолютная звёздная величина (V) 2,2 [1]
Спектральные характеристики
Спектральный класс G5IVD[1]
Показатель цвета
 • B−V 0,96 [1]
Физические характеристики
Масса 1,72 [1] M⊙
Радиус 4,9 [1] R⊙
Возраст 2,0 млрд [1] лет
Температура 5035 [1] K
Светимость 14,1 [1] L⊙
Металличность +0,14 [1]
Вращение 2,76 км/с [1]
Коды в каталогах

BD +07 104, HD 4313, HIC 3574, HIP 3574, PPM 143857, SAO 109437, 2MASS J00454035+0750421, AG +07 82, GSC 00604-01102, SKY# 1182, TYC 604-1102-1, uvby98 100004313, YZ 7 250

Информация в базах данных
SIMBAD данные
Источники: [2]
Логотип Викиданных Информация в Викиданных ?

HD 4313 — звезда в созвездии Рыб на расстоянии около 447 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.

Характеристики

HD 4313 относится к классу жёлтых субгигантов — бывших звёзд главной последовательности, в ядре которых прекратился синтез гелия из водорода. Её масса и диаметр превышают солнечные в 1,72 и 4,9 соответственно[1]. HD 4313 ярче, чем Солнце в 14,1 раз, при этом температура её поверхности составляет всего 5035 кельвинов. Возраст звезды оценивается приблизительно в 2 миллиарда лет.

Планетная система

В 2010 году командой астрономов из обсерватории Кек было объявлено об открытии[1] планеты HD 4313 b в системе. Это газовый гигант, превосходящий по массе Юпитер более, чем вдвое. HD 4313 b обращается на расстоянии 1,19 а. е. от родительской звезды, совершая полный оборот за 356 суток. Открытие было совершено методом Доплера.

Планета
 Масса
(MJ) 		Радиус
(RJ) 		Период обращения
(дней) 		Большая полуось
орбиты(а. е.) 		Эксцентриситет
орбиты
b 2,3±0,2 ? 356±2,6 1,19±0,03 0,041±0,037

Примечания

  1. ↑ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 John Asher Johnson, Andrew W. Howard, Brendan P. Bowler, Gregory W. Henry, Geoffrey W. Marcy, Jason T. Wright, Debra A. Fischer, Howard Isaacson. Retired A Stars and Their Companions IV. Seven Jovian Exoplanets from Keck Observatory (англ.). Arxiv.org (17 марта 2010). Дата обращения: 9 сентября 2010. Архивировано 10 мая 2012 года.
  2. ↑ 1 2 3 4 SIMBAD (англ.). — HD 4313 в базе данных SIMBAD. Дата обращения: 9 сентября 2010.
  3. ↑ Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.

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