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112 Herculis är en dubbelstjärna i Herkules stjärnbild. Stjärnan har visuell magnitud +5,39 och är synlig för blotta ögat vid någorlunda god seeing. Den befinner sig på ett avstånd av ungefär 405 ljusår.
, 112 Геркулеса (лат. 112 Herculis, HD 174933) — кратная звезда в созвездии Геркулеса на расстоянии приблизительно 422 световых лет (около 129 парсек) от Солнца.
, 天市左垣五(武仙座112)也称齐，又名BD+21 3582，HD 174933、SAO 86521、HR 7113，是武仙座的一颗恒星，视星等为5.48，位于銀經52.27，銀緯9.41，其B1900.0坐标为赤經18h 48m 0.1s，赤緯+21° 9.41′ 16″。
, HD174933 — хімічно пекулярна зоря спектрального класу B9, що має видиму зоряну величину в смузі V приблизно 5,4.Вона розташована на відстані близько 459,4 світлових років від Сонця.
, 112 Herculis is a binary star system in th … 112 Herculis is a binary star system in the northern constellation of Hercules. It is dimly visible to the naked eye with a combined apparent visual magnitude of 5.43. The secondary component is about two magnitudes fainter than the primary star. The distance to this system is approximately 415 light years based on parallax measurements. It is drifting closer to the Sun with a radial velocity of −20 km/s. The binary character of this system was discovered by in 1926. By measuring the variation in velocity of the primary component, he determined an orbital period of 6.3624 days. in 1959 found a stellar classification of A4 III for the pair. W. P. Bidelman observed that the primary has unusually strong lines of ionized phosphorus, and it was assigned to the class of peculiar manganese stars by W. L. W. Sargent and L. Searle in 1962, with a resulting spectral type of B9. No evidence was found for a strong magnetic field by in 1970. In 1969, A. Cowley and associates found a stellar class of B9p Hg for this system, indicating a peculiar star with an abundance anomaly of mercury. in 1970 determined a mass ratio of 2.06±0.17 for the pair, which supported individual stellar classes of B7V and A3V for main sequence components. The sharpness of the spectral lines suggested that at least the primary is rotating synchronously with its orbital period. A more detailed analysis by Seligman and L. H. Allen later in 1970 refined the classifications to B6.5V and A2V. The elemental abundances for both stars appeared similar, although the secondary abundances were more uncertain. In 1975, the primary was classified as a mercury-manganese star by and G. C. L. Aikman. and associates in 1996 refined the mass ratio to 1.98±0.03. The primary showed significant deficiencies of helium and mercury, but a large overabundance of iron. The secondary component displayed abundances similar to an Am star. This is a double-lined spectroscopic binary system with an orbital period of 6.36246 days and an eccentricity (ovalness) of 0.11. As of 2021, measurements by the TESS space telescope show a rotation period of 12.4 days for the primary, suggesting that it is not rotating synchronously with its orbit. Some variability in flux was recorded by TESS, but this is due to orbital motion – the stars themselves do not appear to be variable.s themselves do not appear to be variable.
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天市左垣五(武仙座112)也称齐，又名BD+21 3582，HD 174933、SAO 86521、HR 7113，是武仙座的一颗恒星，视星等为5.48，位于銀經52.27，銀緯9.41，其B1900.0坐标为赤經18h 48m 0.1s，赤緯+21° 9.41′ 16″。
, HD174933 — хімічно пекулярна зоря спектрального класу B9, що має видиму зоряну величину в смузі V приблизно 5,4.Вона розташована на відстані близько 459,4 світлових років від Сонця.
, 112 Herculis is a binary star system in th … 112 Herculis is a binary star system in the northern constellation of Hercules. It is dimly visible to the naked eye with a combined apparent visual magnitude of 5.43. The secondary component is about two magnitudes fainter than the primary star. The distance to this system is approximately 415 light years based on parallax measurements. It is drifting closer to the Sun with a radial velocity of −20 km/s.he Sun with a radial velocity of −20 km/s.
, 112 Herculis är en dubbelstjärna i Herkules stjärnbild. Stjärnan har visuell magnitud +5,39 och är synlig för blotta ögat vid någorlunda god seeing. Den befinner sig på ett avstånd av ungefär 405 ljusår.
, 112 Геркулеса (лат. 112 Herculis, HD 174933) — кратная звезда в созвездии Геркулеса на расстоянии приблизительно 422 световых лет (около 129 парсек) от Солнца.
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天市左垣五
, 112 Геркулеса
, 112 Herculis
, HD174933
|
