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Lyra (Chinese Astronomy)
According to traditional Traditional Chinese star names#Categories of Chinese traditional uranography, Chinese uranography, the modern constellation Lyra is located within the northern quadrant of the sky, which is symbolized as the Black Tortoise, Black Tortoise of the North (北方玄武, ''Běi Fāng Xuán Wǔ''). The name of the western constellation in modern Chinese is 天琴座 (''tiān qín zuò''), meaning "the celestial zither constellation". Stars The map of Chinese constellation in constellation Lyra area consists of : See also *Chinese astronomy *Traditional Chinese star names *Chinese constellations References {{reflist External linksLyra – Chinese associations 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] |
Traditional Chinese Star Names
Chinese star names (Chinese language, Chinese: , ''xīng míng'') are named according to ancient Chinese astronomy and Chinese astrology, astrology. The sky is divided into Chinese constellations, star mansions (, ''xīng xiù'', also translated as "lodges") and asterisms (, ''xīng guān''). The ecliptic is divided into four sectors that are associated with the Four Symbols, guardians in Chinese mythology, and further into 28 mansions. Stars around the north celestial pole are grouped into three enclosures (, ''yuán''). The system of 283 asterisms under the Chinese constellations, Three Enclosures and Twenty-Eight Mansions was established by Chen Zhuo of the Three Kingdoms period, who synthesized ancient constellations and the asterisms created by early astronomers Shi Shen, Gan De and Wuxian (Shang dynasty), Wuxian. Since the Han dynasty, Han and Jin dynasty (266–420), Jin dynasties, stars have been given reference numbers within their asterisms in a system similar to the Bayer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iota Lyrae
ι Lyrae, Latinised as Iota Lyrae, is a binary star in the northern constellation of Lyra. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude that fluctuates around 5.22. This object is located approximately 910 light years distant from the Sun based on parallax, but is drifting nearer with a radial velocity of −26 km/s. This is a wide binary system with a computed orbital period of 217 years and an eccentricity of 0.6. The primary component has a stellar classification of B6IV, matching a B-type subgiant star. It is a Be star, displaying emission lines in its spectrum, and is spinning rapidly with a projected rotational velocity of . The star ranges in brightness from magnitude 5.20 down to 5.27. It has about five times the mass of the Sun and is radiating 854 times the Sun's luminosity from its photosphere at an effective temperature The effective temperature of a body such as a star or planet is the temper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 tradition. The Song dynasty (13th-century) Suzhou planisphere shows a total of 283 asterisms, comprising a total of 1,565 individual stars. The asterisms are divided into four groups, the Twenty-Eight Mansions (, ''Èrshíbā Xiù'') along the ecliptic, and the Three Enclosures of the northern sky. The southern sky was added as a fifth group in the late Ming dynasty based on European star charts, comprising an additional 23 asterisms. The Three Enclosures (, ''Sān Yuán'') include the Purple Forbidden Enclosure, which is centered on the north celestial pole and includes those stars which could be seen year-round,Needham, J.Astronomy in Ancient and Medieval China. ''Philosophical Transactions of the Royal Society of London''. Ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Astronomy
Astronomy in China has a long history stretching from the Shang dynasty, being refined over a period of more than 3,000 years. The Ancient China, ancient Chinese people have identified stars from 1300 BCE, as Chinese star names later categorized in the twenty-eight mansions have been found on oracle bones unearthed at Anyang, dating back to the mid-Shang dynasty. The core of the "mansion" (宿 ''xiù'') system also took shape around this period, by the time of King Wu Ding (1250–1192 BCE). Detailed records of astronomical observations began during the Warring States period (fourth century BCE). They flourished during the Han period (202 BCE – 220 CE) and subsequent dynasties with the publication of star catalogues. Chinese astronomy was equatorial, centered on close observation of circumpolar stars, and was based on different principles from those in traditional Western astronomy, where heliacal risings and settings of zodiac constellations formed the basic ecliptic framew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
16 Lyrae
16 Lyrae is a suspected astrometric binary star system in the constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ... Lyra, located 126 light years away from the Sun based on parallax. It is visible to the naked eye as a dim, white-hued star with a combined apparent visual magnitude of 5.00. The system is moving further away from the Earth with a heliocentric radial velocity of +4.36 km/s. It is a suspected member of the Ursa Major Moving Group stream. Cowley et al. (1969) found a stellar classification of A7 V for the visible component, matching an A-type main-sequence star that is generating energy through hydrogen fusion at its core. Abt and Morrell (1995) instead listed a class of A6 IV, suggesting it has left the main sequence an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Lyrae
Theta Lyrae (θ Lyr) is a red giant star in the constellation Lyra, approximately 760 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, which means that it possesses a surface temperature of about 5,000 K, and is many times bigger and brighter, yet cooler, than the Sun. BD+37°3399 and BD+37°3399B are respectively 10th- and 11th-magnitude companions, although not at the same distance. BD+37°3399 is a giant star A giant star has a substantially larger radius and luminosity than a main-sequence (or ''dwarf'') star of the same surface temperature. They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsp ... with a spectral type of K2III. It is therefore almost the same temperature as Theta Lyrae. BD+37° 3399B is an 11th magnitude star of an unknown spectral type. References {{Stars of Lyra Lyra Lyrae, Theta Lyrae, 21 094713 180809 7314 BD+37 3398 Triple s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eta Lyrae
Eta Lyrae, a name Latinized from η Lyrae, is a likely binary star system in the northern constellation of Lyra. It has the traditional name Aladfar and is faintly visible to the naked eye with an apparent visual magnitude of 4.43. The system is located at a distance of approximately 1,390 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −8 km/s. Nomenclature ''η Lyrae'' ( Latinised to ''Eta Lyrae'') is the binary star's Bayer designation. Its designation as the ''A'' component of a double star, and of its two constituents as the ''Aa'' and ''Ab'' components, derives from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). 'BD +38 3491' is the 'B' component's designation in the Bonner Durchmusterung astrometric star catalogue. Eta Lyrae bore the traditional name ''Aladfar'', from the Arabic ''الأظفر'' ''al- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R Lyrae
R Lyrae, also known as its Flamsteed designation 13 Lyrae, is a 4th magnitude semiregular variable star in the constellation Lyra, approximately 350 light years away from Earth. It is visible to the naked eye. It is a red giant star of the spectral type M5III, currently at the last stages of evolution. It is much larger and brighter, yet cooler, than the Sun. In the near-infrared J band, it is brighter than the nearby Vega. R Lyrae is unusual in that it is a red star with a high proper motion, greater than 50 milliarcseconds a year. It is one of the brightest stars at the K band, having an apparent magnitude of −2.08, only 14 stars are brighter. |
HD 180138
HD may refer to: Business * H-D or Harley-Davidson, a motorcycle manufacturer * The Home Depot, NYSE stock symbol: HD Chemistry * Hydrogen deuteride, a diatomic compound of hydrogen and deuterium * Mustard gas Codes * Air Do, formerly Hokkaido International Airlines, IATA designator * HD postcode area, covering Huddersfield, Brighouse and Holmfirth in England, UK * Heidelberg's vehicle registration plate code * Hunedoara County (Romania)'s ISO 3166 code Medicine * Hansen's disease or leprosy * Hirschsprung's disease, a disorder of the abdomen * Huntington's disease, a genetic disorder affecting the central nervous system ** HD (gene) or huntingtin, the IT15 gene, which codes for the huntingtin protein People * H.D. or Hilda Doolittle (1886–1961), American poet and novelist Other uses * ''Helsingborgs Dagblad'', a Swedish newspaper * Henry Draper Catalogue, an astronomical catalogue often used to designate stars * Department of Highways (other) * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nu1 Lyrae
Nu1 Lyrae (ν1 Lyrae) is a star in the northern constellation of Lyra. Based upon an annual parallax shift of 2.69 mas as seen from Earth, it is located around 1,210 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.35 due to interstellar dust. With an apparent visual magnitude of 5.91, the star is barely bright enough to be visible with the naked eye on a dark night. This is a blue-white hued B-type subgiant star with a stellar classification of B3 IV. It is a suspected variable. The star has nearly seven times the mass of the Sun and, at an estimated age of about 40 million years, is spinning with a projected rotational velocity of 145 km/s. It radiates approximately 1460 times the solar luminosity from its photosphere at an effective temperature of 14,534 K. Nu1 Lyrae has five faint visual companions listed in the Washington Double Star Catalog, the nearest being a magn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nu2 Lyrae
Nu2 Lyrae, Latinized from ν2 Lyrae, or sometimes simply Nu Lyrae, is a solitary star in the northern constellation of Lyra. Based upon an annual parallax shift of 13.92 mas as seen from Earth, it is located around 234 light years from the Sun. With an apparent visual magnitude of 5.23, it is bright enough to be faintly visible to the naked eye. This is a white-hued A-type main sequence star with a stellar classification of A3 V. At an estimated age of 214 million years, it is spinning with a projected rotational velocity of 128 km/s. This is giving the star an oblate shape with an equatorial bulge that is 5% larger than the polar radius. Nu2 Lyrae has an estimated 1.9 times the mass of the Sun and about 1.5 times the Sun's radius. It is radiating 32 times the solar luminosity 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 sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambda Lyrae
λ Lyrae, Latinized as Lambda Lyrae, is a suspected binary star system in the northern constellation of Lyra. It is an orange-hued point of light that is dimly visible to the naked eye with an apparent visual magnitude of 4.94. The system is located approximately 1,300 light years distant from the Sun based on parallax, but is drifting closer with a radial velocity of −17.7 km/s. The visible component is an aging giant star with a stellar classification of K2.5III:Ba0.5 and an estimated age of around 58 million years. The suffix notation indicates this is a mild barium star and hence it may have a white dwarf companion, while the colon indicates there is some uncertainty about the class. Having exhausted the supply of hydrogen at its core, it has cooled and expanded off the main sequence, and now has 105 times the radius of the Sun. The star has six times the mass of the Sun and is radiating over 4,300 times the Sun's luminosity from its swollen photo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
