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EN Большой Медведицы

EN Большой Медведицы
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 10ч 21м 3,34с[1]
Склонение +68° 44′ 51,56″[1]
Расстояние 132,6014 ± 1,0585 пк[1]
Видимая звёздная величина (V) 5,9 ± 0,009[2]
Созвездие Большая Медведица
Астрометрия
Лучевая скорость (Rv) 3,9 ± 2,9 км/с[3]
Собственное движение
 • прямое восхождение −54,165 ± 0,097 mas/год[1]
 • склонение −33,706 ± 0,12 mas/год[1]
Параллакс (π) 7,5414 ± 0,0602 mas[1]
Спектральные характеристики
Спектральный класс A7Vn[4]
Показатель цвета
 • B−V 0,24
 • U−B 0,12
Физические характеристики
Температура 7280 К[5], 7430 К[5] и 7129 К[5]
Металличность 1,38[5] и −0,31[5]
Вращение 175 км/с[6][4]
Коды в каталогах

FK5 2828, GCRV 6504, GSC 04384-01976, HD 89343, HIC 50685, HIP 50685, HR 4047, IRAS 10172+6900, 2MASS J10210335+6844516, PMC 90-93 1297, PPM 17408, ROT 7143, SAO 15147, TD1 14737, uvby98 100089343, AG+69 438, BD+69 568, TYC 4384-1976-1, WEB 9289, Gaia DR2 1073264537170851840, EN UMa, GC 14180, GEN# +1.00089343 и SKY# 19886

Информация в базах данных
SIMBAD V* EN UMa
Логотип Викиданных Информация в Викиданных ?

EN Большой Медведицы (лат. EN Ursae Majoris), HD 89343 — одиночная переменная звезда в созвездии Большой Медведицы на расстоянии приблизительно 432 световых лет (около 133 парсеков) от Солнца. Видимая звёздная величина звезды — от +5,88m до +5,83m[7].

Характеристики

EN Большой Медведицы — белая пульсирующая переменная звезда типа Дельты Щита (DSCTC)[7] спектрального класса A7Vn[4]. Эффективная температура — около 7280 К[5].

Примечания

  1. ↑ 1 2 3 4 5 6 Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.
  2. ↑ Oja T. UBV photometry of stars whose positions are accurately known. VI (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 1991. — Vol. 89. — P. 415–419. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846
  3. ↑ Gontcharov G. A. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system (англ.) // Astronomy Letters / R. Sunyaev — Nauka, Springer Science+Business Media, 2006. — Vol. 32, Iss. 11. — P. 759–771. — ISSN 1063-7737; 1562-6873; 0320-0108; 0360-0327 — doi:10.1134/S1063773706110065 — arXiv:1606.08053
  4. ↑ 1 2 3 Royer F., Zorec J., Gómez A. E. Rotational velocities of A-type stars. III. Velocity distributions (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 2007. — Vol. 463, Iss. 2. — P. 671–682. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361:20065224 — arXiv:astro-ph/0610785
  5. ↑ 1 2 3 4 5 6 Adamczak J., Lambert D. L. Carbon and oxygen abundances across the Hertzsprung gap (англ.) // The Astrophysical Journal Letters — IOP Publishing, 2014. — Vol. 791, Iss. 1. — 12 p. — ISSN 2041-8205; 2041-8213 — doi:10.1088/0004-637X/791/1/58 — arXiv:1407.2157
  6. ↑ Royer F., Grenier S., Baylac, M. -O., Gómez A. E., Zorec J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 2002. — Vol. 393, Iss. 3. — P. 897—911. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361:20020943 — arXiv:astro-ph/0205255
  7. ↑ 1 2 EN 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 6 августа 2012 на Wayback Machine Accessed online 2020-08-12.

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