ET Близнецов

ET Близнецов
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 6ч 39м 26,31с[1]
Склонение +21° 00′ 17,62″[1]
Расстояние 2211,411 ± 168,2276 пк[1]
Созвездие Близнецы
Астрометрия
Лучевая скорость (Rv) 43,26 ± 0,73 км/с[2]
Собственное движение
 • прямое восхождение −0,203 ± 0,042 mas/год[1]
 • склонение −2,647 ± 0,033 mas/год[1]
Параллакс (π) 0,4522 ± 0,0344 mas[1]
Спектральные характеристики
Спектральный класс M6.5[2]
Переменность медленная неправильная[3] и долгопериодическая[2]
Физические характеристики
Температура 3297 К[2]
Металличность −0,19[2]
Коды в каталогах
2MASS J06392629+2100176, CSV 800, GSC 01341-01602, IRAS 06364+2103, Gaia DR2 3378833901132558464, ET Gem, ASAS J063926+2100.3, TIC 194931518 и Gaia DR3 3378833901132558464
Информация в базах данных
SIMBAD V* ET Gem
Логотип Викиданных Информация в Викиданных ?

ET Близнецов (лат. ET Geminorum) — одиночная переменная звезда[4] в созвездии Близнецов на расстоянии (вычисленном из значения параллакса) приблизительно 6 345 световых лет (около 1 945 парсек) от Солнца. Видимая звёздная величина звезды — от +14,1m до +13,1m[5].

Характеристики

ET Близнецов — красная пульсирующая медленная неправильная переменная звезда (LB)[6] спектрального класса M6,5[5][7]. Эффективная температура — около 3295 К[8].

Примечания

  1. ↑ 1 2 3 4 5 6 Gaia Early Data Release 3 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2020.
  2. ↑ 1 2 3 4 5 SIMBAD Astronomical Database
  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. ↑ Kinnunen T., Skiff B. A. Coordinates and identifications for Sonneberg variables on MVS 291-295 (англ.) // Information Bulletin on Variable Stars — Konkoly Observatory, 2000. — Vol. 4896. — P. 1–5. — ISSN 0374-0676; 1587-2440; 1587-6578
  5. ↑ 1 2 ET Gem Архивная копия от 5 июля 2020 на Wayback Machine, 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 2022-04-07.
  6. ↑ Woźniak P. R., Williams S. J., Vestrand W. T., Gupta V. Identifying red variables in the Northern Sky Variability Survey (англ.) // The Astronomical Journal / J. G. III, E. Vishniac — New York City: IOP Publishing, AAS, University of Chicago Press, AIP, 2004. — Vol. 128, Iss. 6. — P. 2965–2976. — ISSN 0004-6256; 1538-3881 — doi:10.1086/425526
  7. ↑ N. N. Samus’, Kazarovets E. V., Durlevich O. V., Kireeva N. N., Pastukhova E. N. General catalogue of variable stars: Version GCVS 5.1 (англ.) // Astronomy Reports / D. Bisikalo — MAIK Nauka/Interperiodica, Springer Science+Business Media, 2017. — Vol. 61, Iss. 1. — P. 80–88. — ISSN 1063-7729; 1562-6881; 0004-6299 — doi:10.1134/S1063772917010085
  8. ↑ Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.

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