Y Большой Медведицы

Y Большой Медведицы
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 12ч 40м 21,28с[1]
Склонение +55° 50′ 47,60″[1]
Расстояние 308,6896 ± 16,2468 пк[1]
Видимая звёздная величина (V) 7,7[2]
Созвездие Большая Медведица
Астрометрия
Собственное движение
 • прямое восхождение −5,57 ± 0,23 mas/год[1]
 • склонение 0,767 ± 0,262 mas/год[1]
Параллакс (π) 3,2395 ± 0,1705 mas[1]
Спектральные характеристики
Спектральный класс M7II-III:[3]
Показатель цвета
 • B−V 1,96
Переменность SRB полуправильная[4]
Информация в базах данных
SIMBAD V* Y UMa
Логотип Викиданных Информация в Викиданных ?

Y Большой Медведицы (лат. Y Ursae Majoris), HD 110259 — одиночная переменная звезда в созвездии Большой Медведицы на расстоянии приблизительно 1007 световых лет (около 309 парсеков) от Солнца. Видимая звёздная величина звезды — от +9,8m до +7,7m[5].

Характеристики

Y Большой Медведицы — красный гигант или яркий гигант, пульсирующая полуправильная переменная звезда типа SRB (SRB) спектрального класса M7II-III:[5][3].

Примечания

  1. 1 2 3 4 5 6 Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.
  2. Ducati J. R. Catalogue of Stellar Photometry in Johnson's 11-color system (англ.) — 2002. — Vol. 2237.
  3. 1 2 Keenan P. C. Luminosities of the M-type variables of small range (англ.) // The Astrophysical Journal LettersIOP Publishing, 1942. — Vol. 95. — P. 461–467. — ISSN 2041-8205; 2041-8213doi:10.1086/144418
  4. Samus N. N., Durlevich O. V., et a. General Catalogue of Variable Stars (Samus+ 2007-2011) — 2009. — Т. 1. — С. 2025.
  5. 1 2 Y UMa, database entry, Combined General Catalog of Variable Stars (GCVS5.1, 2017 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Архивная копия от 1 июля 2015 на Wayback Machine Accessed online 2020-08-08.

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