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Aquila (Chinese Astronomy)
The modern constellation Aquila lies across one of the quadrants symbolized by the Black Tortoise of the North (北方玄武, ''Běi Fāng Xuán Wǔ''), and Three Enclosures (三垣, ''Sān Yuán'') that divide the sky in traditional Chinese uranography. The name of the western constellation in modern Chinese is 天鷹座 (''tiān yīng zuò''), meaning "the heaven eagle constellation". Stars The map of Chinese constellation in constellation Aquila area consists of : See also *Traditional Chinese star names *Chinese constellations Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese ''xīng guān''). The Chinese asterisms are generally smaller than the constellations of Hellenistic t ... References {{reflist External linksAquila – Chinese associations香港太空館https://web.archive.org/web/20120813070951/http://www.lcsd.gov.hk/CE/Museum/Space/Research/c_index.htm 研究資源] * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquila (constellation)
Aquila is a constellation on the celestial equator. Its name is Latin for 'eagle' and it represents the bird that carried Zeus/Jupiter's thunderbolts in Greek-Roman mythology. Its brightest star, Altair, is one vertex of the Summer Triangle asterism. The constellation is best seen in the northern summer, as it is located along the Milky Way. Because of this location, many clusters and nebulae are found within its borders, but they are dim and galaxies are few. History Aquila was one of the 48 constellations described by the second-century astronomer Ptolemy. It had been earlier mentioned by Eudoxus in the fourth century BC and Aratus in the third century BC. It is now one of the 88 constellations defined by the International Astronomical Union. The constellation was also known as ''Vultur volans'' (the flying vulture) to the Romans, not to be confused with ''Vultur cadens'' which was their name for Lyra. It is often held to represent the eagle which held Zeus's/Jupiter's t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
62 Serpentis
HR 7135 is a binary star system. Despite its Flamsteed designation of 62 Serpentis, the star can be found in the equatorial constellation of Aquila, in front of a dark rift in the Milky Way near the constellation border. It is visible to the naked eye as a dim, yellow-hued point of light with an apparent visual magnitude of 5.57. The system is located 283 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of 23 km/s. Discovery of the binary nature of this system is credited to Canadian astronomer H. H. Plaskett in 1922. It is a single-lined spectroscopic binary with an orbital period of and an eccentricity of 0.24. The visible component is an aging giant star with a stellar classification of G9 III, having exhausted the supply of hydrogen at its core and expanded to 10.7 times the Sun's radius. It is a red clump giant, indicating it is on the horizontal branch and is generating energy via core helium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ox (Chinese Constellation)
The Ox mansion (牛宿, pinyin: Niú Xiù) is one of the Twenty-eight mansions of the Chinese constellations. It is one of the northern mansions of the Black Tortoise. The primary asterism of this mansion is centered on the tail of the constellation known as Capricornus Capricornus is one of the constellations of the zodiac. Its name is Latin for "horned goat" or "goat horn" or "having horns like a goat's", and it is commonly represented in the form of a sea goat: a mythical creature that is half goat, half f ... in Western astronomy. Asterisms References {{DEFAULTSORT:Ox (Chinese Constellation) Chinese constellations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
21 Aquilae
21 Aquilae is a solitary variable star in the equatorial constellation of Aquila. It has the variable star designation V1288 Aql; ''21 Aquilae'' is its Flamsteed designation. This object is visible to the naked eye as a dim, blue-white hued star with a baseline apparent visual magnitude of about 5.1. The star is located at a distance of around from Earth, give or take a 20 light-year margin of error. It is moving closer to the Earth with a heliocentric radial velocity of –5 km/s. The stellar classification of this star is B8 II-III, with the luminosity class of II-III suggesting that the spectrum displays elements of both a giant star and a bright giant. It is a chemically peculiar star of the Mercury-Manganese type (CP3), although some catalogues consider that status to be doubtful. This is a probable Alpha2 Canum Venaticorum variable that ranges in visual magnitude from 5.06 down to 5.16. The star is radiating 704 times the luminosity of the Sun fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20 Aquilae
20 Aquilae, abbreviated 20 Aql, is an irregular variable star in the equatorial constellation of Aquila. ''20 Aquilae'' is its Flamsteed designation. It ranges in magnitude from a peak of 5.33 down to 5.36, which is bright enough for the star to be visible to the naked eye. The estimated distance to this star is around 920 light years, based upon an annual parallax shift of . The star is moving closer to the Earth with a heliocentric radial velocity of −23 km/s. There has been some disagreement over the stellar classification of this star. Buscombe (1962) listed a class of B3 IV, which suggests a B-type subgiant star that has exhausted the hydrogen at its core and is expanding off the main sequence. Lesh (1968) and Braganca et al. (2012) matched a B-type main sequence star with a class of B3 V. However, Houk and Swift (1999) found a class of B2/3 II, indicating this is an evolved bright giant. The star is about 28 million years old with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8 Aquilae
8 Aquilae is a star in the equatorial constellation of Aquila, located 271 light years away from the Sun. ''8 Aquilae'' is the Flamsteed designation. It can be viewed with the naked eye in good seeing conditions, appearing as a dim, yellow-white hued star with an apparent visual magnitude of 6.08. The star is moving further from the Earth with a heliocentric radial velocity of +12 km/s. Abt and Morrell (1995) found a stellar classification of F0 IV for this star, suggesting it is an F-type subgiant. In their 2010 study, Fox Machado et al. assigned a class of F2 III, which matches an evolved giant star. Despite the spectral classifications, evolutionary models place the star towards the end of its main sequence life, with an age of about a billion years. 8 Aquilae is a Delta Scuti variable with at least three overlapping pulsation frequencies, although the total amplitude of its brightness variations is only about 0.02 magnitudes. It has a relativel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
7 Aquilae
7 Aquilae is a star in the equatorial constellation of Aquila, located 359 light years away from the Sun. ''7 Aquilae'' is the Flamsteed designation. It is visible to the naked eye as a faint, yellow-white hued star with a baseline apparent visual magnitude of 6.9. The star is moving closer to the Earth with a heliocentric radial velocity of . Houk and Swift (1999) find a stellar classification of F0IV, matching an F-type subgiant star that has exhausted the hydrogen at its core and is evolving into a giant. Fox Machado et al. (2010) found a class of F0V, suggesting it is still a main sequence star. This is a pulsating variable star of the Delta Scuti type. It has double the mass of the Sun and 2.7 times the Sun's radius. The detection of an infrared excess suggests a debris disk A debris disk (American English), or debris disc (Commonwealth English), is a circumstellar disk of dust and debris in orbit around a star. Sometimes these disks contain prominent ring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5 Aquilae
5 Aquilae (abbreviated 5 Aql) is a quadruple star system in the constellation of Aquila. ''5 Aquilae'' is the Flamsteed designation. The combined apparent visual magnitude of the system is 5.9, which means it is faintly visible to the naked eye. With an annual parallax shift of 8.94 mas, the distance to this system is estimated as approximately , albeit with a 13% margin of error. Two of the components of this system, 5 Aquilae Aa and Ab, are Am stars. That is, they are chemically peculiar stars that show unusual abundances of elements other than hydrogen and helium. The two orbit each other with a period lasting 33.65 years at an eccentricity of 0.33. One of these stars is itself a close spectroscopic binary, with a 4.765 day period and a nearly circular orbit that has an eccentricity of just 0.02. The fourth component, 5 Aquilae B, is a magnitude 7.65 F-type main sequence star with a stellar classification of F3 Vm. It is at an angular separation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14 Aquilae
14 Aquilae is a probable spectroscopic binary star system in the equatorial constellation of Aquila. ''14 Aquilae'' is the Flamsteed designation though it also bears the Bayer designation g Aquilae. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.42, and it is located at a distance of approximately from Sun. The star is moving closer to the Earth with a heliocentric radial velocity of , and may come as close as in around 3.5 million years. The visible component is an A-type main sequence star with a stellar classification of A1 V. It has 3.25 times the mass of the Sun and about twice the Sun's radius. The projected rotational velocity is relatively low at 23 km/s. The star is radiating 214 times the luminosity of the Sun from its photosphere at an effective temperature The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15 Aquilae
15 Aquilae (abbreviated 15 Aql) is a star in the equatorial constellation of Aquila. ''15 Aquilae'' is the Flamsteed designation; it also bears the Bayer designation h Aquilae. The apparent visual magnitude is 5.41, so it is faintly visible to the naked eye. An optical companion, HD 177442, is 39 arc seconds away from it The distance to 15 Aquilae can be estimated from its annual parallax shift of 11.27 mas, yielding a range of approximately from Earth with a 9 light-year margin of error. With a stellar classification of K1 III, the spectrum of 15 Aquilae matches a giant star with an age of roughly four billion years. At this stage of its evolution, the outer atmosphere of the star has expanded to 14 times the radius of the Sun. It is radiating 83 times the Sun's luminosity into space at an effective temperature of 4,560 K. This heat gives it the orange-hued glow of a K-type star. This star is most likely a member of the thin disk population of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambda Aquilae
Lambda Aquilae, Latinized from λ Aquilae, is a star in the constellation Aquila. It has the traditional name Al Thalimain , which it shares with ι Aquilae. The name is derived from the Arabic الظلیمين ''al-ẓalīmayn'' "the two ostriches". Lambda Aquilae is more precisely ''Al Thalimain Prior''. It has an apparent visual magnitude of 3.43, which is bright enough to be seen with the naked eye. Parallax measurements place it at a distance of about from Earth. Properties Lambda Aquilae is a main sequence star with a stellar classification of B9Vn, which means that, like the Sun, it is generating energy at its core through the nuclear fusion of hydrogen. It is more massive than the Sun, with about three times its mass, and radiates about 55 times the Sun's luminosity from its outer envelope at a higher effective temperature of 11,780 K. This temperature gives Lambda Aquilae the blue-white hue that is a characteristic of B-type stars. Lambda Aquilae was one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
12 Aquilae
12 Aquilae (abbreviated 12 Aql) is a star in the equatorial constellation of Aquila. ''12 Aquilae'' does not have a Bayer designation and is most easily recognized in the sky being next to the brighter star λ (lambda) Aquilae. In Chinese, (), meaning '' Market Officer'', refers to an asterism consisting of 12 Aquilae, α Scuti, δ Scuti, ε Scuti, β Scuti, η Scuti, λ Aquilae, 15 Aquilae and 14 Aquilae. ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, . Consequently, 12 Aquilae itself is known as (, en, the Sixth Star of Market Officer.) This star has an apparent visual magnitude of 4.02, which is bright enough to be seen with the naked eye, although, according to the Bortle Dark-Sky Scale, it is a challenge to view from the inner city. Based upon an annual parallax shift of 22.66 mas, the distance to this star is with a margin of error of one light-year. This is an evolved giant star of stellar class K1& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
