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23 Большой Медведицы

23 Большой Медведицы
Звезда
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Наблюдательные данные
(Эпоха J2000.0)
Прямое восхождение 9ч 31м 31,71с[1]
Склонение +63° 03′ 42,70″[1]
Расстояние 23,7584 ± 0,0912 пк[1]
Видимая звёздная величина (V) 3,67[2]
Созвездие Большая Медведица
Астрометрия
Лучевая скорость (Rv) −1,38 ± 0,37 км/с[3]
Собственное движение
 • прямое восхождение 107,818 ± 0,104 mas/год[1]
 • склонение 26,791 ± 0,143 mas/год[1]
Параллакс (π) 42,0904 ± 0,162 mas[1]
Спектральные характеристики
Спектральный класс F0V[4]
Показатель цвета
 • B−V 0,33
 • U−B 0,1
Переменность Переменная типа Дельты Щита
Физические характеристики
Масса 1,862 M☉
Возраст 1,3 млрд. лет
Температура 6651 К[5]
Вращение 155,3 км/с[6]
Коды в каталогах

2MASS J09313170+6303427, GSC 04139-01304, HD 81937, HIP 46733, HR 3757, IRAS 09276+6316, SAO 14908, GJ 3559, h UMa, ADS 7402 A, BD+63 845, CCDM J09315+6303A, CSV 101051, FK5 355, GC 13109, GCRV 6154, HIC 46733, IDS 09236+6330 A, IRC +60195, JP11 1816, N30 2258, NSV 4506, PLX 2253, PLX 2253.00, PMC 90-93 254, PPM 17085, RAFGL 4744S, ROT 1475, TD1 13954, TYC 4139-1304-1, UBV 9040, uvby98 100081937 A, WDS J09315+6304A, WEB 8813, Gaia DR2 1064092789128664960, 23 UMa, 1RXS J093130.6+630341, Gaia DR3 1064092789129355136, TIC 86336880, AG+63 544 и UBV M 15435

Информация в базах данных
SIMBAD * h UMa
Логотип Викиданных Информация в Викиданных ?

23 Большой Медведицы (лат. 23 Ursae Majoris), h Большой Медведицы (лат. h Ursae Majoris), HD 81937 — двойная звезда в созвездии Большой Медведицы на расстоянии приблизительно 76,9 световых лет (около 23,6 парсеков) от Солнца. Видимая звёздная величина звезды — от +3,68m до +3,65m[7]. Возраст звезды оценивается как около 1,3 млрд лет[5].

Характеристики

Первый компонент — жёлто-белый субгигант, предположительно переменная звезда[7] спектрального класса F0IV[8][9][10][5]. Масса — около 1,862 солнечной, радиус — около 2,9 солнечных, светимость — около 14,8 солнечных. Эффективная температура — около 6651 К[5].

Второй компонент удалён на 22,7 угловых секунды.

Примечания

  1. ↑ 1 2 3 4 5 6 Gaia Early Data Release 3 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2020.
  2. ↑ Ducati J. R. Catalogue of Stellar Photometry in Johnson's 11-color system (англ.) — 2002. — Vol. 2237.
  3. ↑ Gaia Data Release 3 (англ.) / Data Processing and Analysis Consortium, European Space Agency — 2022.
  4. ↑ Abt H. A., Morrell N. I. The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars (англ.) // The Astrophysical Journal: Supplement Series — AAS, 1995. — Vol. 99. — P. 135–172. — ISSN 0067-0049; 1538-4365 — doi:10.1086/192182
  5. ↑ 1 2 3 4 Boyajian T. S., Braun K. v., Belle G. v., Farrington C., Schaefer G., Jones J., White R., McAlister H. A., Brummelaar T. A. t., Ridgway S. et al. Stellar diameters and temperatures. III. Main-sequence A, F, G, and K stars: additional high-precision measurements and empirical relations (англ.) // The Astrophysical Journal / E. Vishniac — IOP Publishing, 2013. — Vol. 771, Iss. 1. — P. 40. — ISSN 0004-637X; 1538-4357 — doi:10.1088/0004-637X/771/1/40 — arXiv:1306.2974
  6. ↑ Schröder C., Reiners A., Schmitt J. H. M. M. Ca II HK emission in rapidly rotating stars (англ.) // Astronomy and Astrophysics / T. Forveille — EDP Sciences, 2009. — Vol. 493, Iss. 3. — P. 1099–1107. — ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 — doi:10.1051/0004-6361:200810377
  7. ↑ 1 2 NSV 4506, 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 2020-08-02.
  8. ↑ Eggen O. J. Space-velocity vectors for 3483 stars with proper motion and radial velocity (англ.) // (unknown type) — 1962. — Vol. 51. — P. 79.
  9. ↑ Eggen O. J. Stellar groups. VIII. The structure of the Sirius group (англ.) // Monthly Notices of the Royal Astronomical Society / D. Flower — OUP, 1960. — Vol. 120. — P. 563. — ISSN 0035-8711; 1365-2966
  10. ↑ Eggen O. Distribution of the nearer bright stars in the color-luminosity array (англ.) // The Astronomical Journal / J. G. III, E. Vishniac — New York City: IOP Publishing, AAS, University of Chicago Press, AIP, 1957. — Vol. 62. — P. 45–55. — ISSN 0004-6256; 1538-3881 — doi:10.1086/107457

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