EI Водолея

EI Водолея
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 21ч 29м 20,25с[1]
Склонение −6° 58′ 59,94″[1]
Расстояние 527,037 ± 12,7773 пк[1]
Видимая звёздная величина (V) 11,42 ± 0,16[2]
Созвездие Водолей
Астрометрия
Собственное движение
 • прямое восхождение −5,052 ± 0,068 mas/год[1]
 • склонение −16,373 ± 0,06 mas/год[1]
Параллакс (π) 1,8974 ± 0,046 mas[1]
Спектральные характеристики
Показатель цвета
 • B−V 0,38
Переменность затменная звезда[3][4]
Коды в каталогах
AN 252.1932, CSV 5423, 2MASS J21292025-0658599, TYC 5207-206-1, Gaia DR1 6898070970364811392, Gaia DR2 6898070970364811392 и EI Aqr
Информация в базах данных
SIMBAD V* EI Aqr
Логотип Викиданных Информация в Викиданных ?

EI Водолея (лат. EI Aquarii) — двойная затменная переменная звезда типа Алголя (EA) в созвездии Водолея на расстоянии приблизительно 1719 световых лет (около 527 парсеков) от Солнца. Видимая звёздная величина звезды — от +12,2m до +11,5m[5]. Орбитальный период — около 1,2223 суток.

Характеристики

Первый компонент — жёлто-белая звезда спектрального класса F. Эффективная температура — около 6332 К[1].

Примечания

  1. 1 2 3 4 5 6 7 Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.
  2. Høg E., Fabricius C., Makarov V. V., Urban S., Corbin T., Wycoff G., Bastian U., Schwekendiek P., Wicenec A. The Tycho-2 catalogue of the 2.5 million brightest stars (англ.) // Astronomy and Astrophysics / T. ForveilleEDP Sciences, 2000. — Vol. 355. — P. L27—L30. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846
  3. Kukarkin B. V., Kholopov P. N., Pskovsky Y. P., Efremov Y. N., Kukarkina N. P., Kurochkin N. E., Medvedeva G. I. General Catalogue of Variable Stars, 3rd ed. — 1971.
  4. Kreiner J. M. Up-to-date linear elements of eclipsing binaries (англ.) // Acta Astronomica / M. KubiakCopernicus Foundation for Polish Astronomy, 2004. — Vol. 54. — P. 207–210. — ISSN 0001-5237
  5. EI Aqr, 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 2020-10-14.

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