6 Гидры

6 Гидры
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 8ч 40м 1,47с[1]
Склонение −12° 28′ 31,35″[1]
Расстояние 129,092 ± 1,5232 пк[1]
Видимая звёздная величина (V) 4,969 ± 0,009[2]
Созвездие Гидра
Астрометрия
Лучевая скорость (Rv) −7,68 ± 0,23 км/с[3]
Собственное движение
 • прямое восхождение −81,269 ± 0,101 mas/год[1]
 • склонение 2,03 ± 0,12 mas/год[1]
Параллакс (π) 7,7464 ± 0,0914 mas[1]
Абсолютная звёздная величина (V) −0,4
Спектральные характеристики
Спектральный класс K3III[4]
Показатель цвета
 • B−V 1,428
Физические характеристики
Температура 4050 К[5]
Металличность −0,21[5]
Вращение < 19 км/с[6]
Коды в каталогах

HD 73840, HIP 42509, HR 3431, IRAS 08376-1217, 2MASS J08400148-1228313, SAO 154515, GSC 05437-02459, a Hya, TIC 101105374, FK5 325, GC 11908, GCRV 5718, HIC 42509, IRC -10200, N30 2022, PLX 2068, PLX 2068.00, PMC 90-93 237, PPM 220446, RAFGL 4705S, ROT 1361, SACS 188, TYC 5437-2459-1, UBV 8325, YZC 11 3331, Gaia DR1 5747442875216347776, WEB 8186, Gaia DR2 5747442879511136640, 6 Hya, Gaia DR3 5747442879511136640 и UBV M 14579

Информация в базах данных
SIMBAD * a Hya
Логотип Викиданных Информация в Викиданных ?

6 Гидры (лат. 6 Hydrae), a Гидры (лат. a Hydrae), HD 73840 — двойная звезда в созвездии Гидры на расстоянии приблизительно 373 световых лет (около 114 парсек) от Солнца. Видимая звёздная величина звезды — +4,981m[7].

Характеристики

Первый компонент — оранжевый гигант спектрального класса K2[8][9], или K3III[10], или K4III[11]. Масса — около 2,255 солнечной, радиус — около 30,226 солнечного, светимость — около 266,855 солнечной. Эффективная температура — около 4080 K[3].

Второй компонент — коричневый карлик. Масса — около 29 юпитерианских[7]. Удалён в среднем на 1,961 а.е.[7].

Примечания

  1. ↑ 1 2 3 4 5 6 Gaia Early Data Release 3 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2020.
  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. Forveille — EDP Sciences, 2000. — Vol. 355. — P. L27—L30. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846
  3. ↑ 1 2 Gaia Data Release 2 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2018.
  4. ↑ Houk N., Smith-Moore M. Catalogue of two-dimensional spectral types for the HD stars (англ.) — 1988. — Vol. 4.
  5. ↑ 1 2 McWilliam A. High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances (англ.) // The Astrophysical Journal: Supplement Series — AAS, 1990. — Vol. 74. — P. 1075–1128. — ISSN 0067-0049; 1538-4365 — doi:10.1086/191527
  6. ↑ Uesugi A., Fukuda I. Catalogue of rotational velocities of the stars (англ.) — 1970. — Vol. 189.
  7. ↑ 1 2 3 Kervella P., Arenou F., Mignard F., Thévenin F. Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 2019. — Vol. 623. — P. 72–72. — 23 p. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361/201834371 — arXiv:1811.08902
  8. ↑ Cannon A. J., Pickering E. C. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925) (англ.) // Annals of the Astronomical Observatory of Harvard College — 1918. — Vol. 91-100.
  9. ↑ Roeser S., Bastian U. PPM (Positions and Proper Motions) North Star Catalogue (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 1988. — Vol. 74. — P. 449. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846
  10. ↑ Cruzalèbes P., Petrov R. G., Robbe-Dubois S., Varga J., Burtscher L., Allouche F., Berio P., Hofmann, K. -H., Hron J., Jaffe W. et al. A catalogue of stellar diameters and fluxes for mid-infrared interferometry (англ.) // Monthly Notices of the Royal Astronomical Society / D. Flower — OUP, 2019. — Vol. 490, Iss. 3. — P. 3158—3176. — ISSN 0035-8711; 1365-2966 — doi:10.1093/MNRAS/STZ2803 — arXiv:1910.00542
  11. ↑ Eggleton P. P., Tokovinin A. A. A Catalog of Multiplicity among Bright Stellar Systems (англ.) // Monthly Notices of the Royal Astronomical Society / D. Flower — OUP, 2008. — Vol. 389, Iss. 2. — P. 869–879. — 11 p. — ISSN 0035-8711; 1365-2966 — doi:10.1111/J.1365-2966.2008.13596.X — arXiv:0806.2878

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