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Lyra (Chinese Astronomy)
According to traditional Chinese uranography, the modern constellation Lyra is located within the northern quadrant of the sky, which is symbolized as the 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 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 linksLyra – Chinese associations https: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traditional Chinese Star Names
Chinese star names ( Chinese: , ''xīng míng'') are named according to ancient Chinese astronomy and astrology. The sky is divided into star mansions (, ''xīng xiù'', also translated as "lodges") and asterisms (, ''xīng guān''). The system of 283 asterisms under 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. Since the Han and Jin Dynasties, stars have been given reference numbers within their asterisms in a system similar to the Bayer or Flamsteed designations, so that individual stars can be identified. For example, Deneb (α Cyg) is referred to as (''Tiān Jīn Sì'', the Fourth Star of Celestial Ford). In the Qing Dynasty, Chinese knowledge of the sky was improved by the arrival of European star charts. ''Yixiang Kaocheng'', compiled in mid-18th century by then deputy Minister of Rites Ignaz Kög ... [...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 The solar luminosity (), is a unit of radiant flux (power emitted in the form of photons) conventionally used by a ... [...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''. Series A, ... [...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 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) and flourished from the Han period onward. 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 framework. Joseph Needham has described the ancient Chinese as the most persistent and accurate obser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
16 Lyrae
16 Lyrae is a suspected astrometric binary star system in the constellation 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 +5 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 and become a subgiant star. It is 791 million years old with a high rate of spin, showing a projected rotational velocity Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Lyrae
Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 770 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 kelvins, and is many times bigger and brighter, yet cooler, than the Sun. It is orbited by a subsystem composed of BD+37° 3399 and BD+37° 3399B. 10th magnitude BD+37° 3399 is a giant star A giant star is a star with substantially larger radius and luminosity than a main sequence, main-sequence (or ''dwarf'') star of the same effective temperature, surface temperature.Giant star, entry in ''Astronomy Encyclopedia'', ed. Patrick Moo ... with a spectral type of K2III. It is therefore almost the same temperature as Theta Lyrae, but smaller and dimmer. BD+37° 3399B is an 11th magnitude star of an unknown spectral type. References {{Stars of Lyra Lyra (constellation) Lyrae, Theta Lyrae, 21 094713 180 ... [...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-ʼ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R Lyrae
R Lyrae, also known as its Flamsteed designation 13 Lyrae, is a 4th apparent magnitude, magnitude semiregular variable star in the constellation Lyra, approximately 350 light years away from Earth. It is a red giant star of the spectral type M5III, meaning it has a surface temperature of under 3,500 kelvins. It is much larger and brighter, yet cooler, than the Sun. In the near-infrared J band (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. The variability is not consistent and regular, but periods of 46, 64, 378, and 1,000 days have been reported, with the 46-day period being the strongest. It is calculated that R Lyrae was a star on the main sequence. It is considered an oxygen-rich asymptotic giant branch star, with both hydrogen and helium shells fusing. References {{Stars of Lyra Lyra Flamsteed objects, Lyrae, 13 Objects with variable ... [...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 2.49 mas as seen from Earth, it is located approximately 1,300 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 four faint visual companions, the nearest being a magnitude 13.0 star at an angular separation ... [...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 14.09 mas as seen from Earth, it is located around 231 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 same ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambda Lyrae
λ Lyrae, Romanization of Greek, Latinized from Lambda Lyrae, is a suspected binary star system in the northern constellation of Lyra (constellation), 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 stellar parallax, 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 stellar core, core, it has cooled and expanded off the main sequence, and now has 102 times the radius of the Sun. The star has six times the mass of the Sun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
