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Delphinus (Chinese Astronomy)
According to traditional Chinese uranography, the modern constellation Delphinus 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 海豚座 (''hǎi tún zuò''), meaning "the dolphin constellation". Stars The map of Chinese constellation in constellation Delphinus 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 linksDelphinus – Chinese associations h ... [...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] |
Beta Delphini
Beta Delphini (β Delphini, abbreviated Beta Del, β Del) is a binary star in the constellation of Delphinus. It is the brightest star in Delphinus. The two components of the system are designated Beta Delphini A (officially named Rotanev , which is historically the name of the system) and B. Nomenclature ''β Delphini'' ( Latinised to ''Beta Delphini'') is the binary's Bayer designation. The designations of the two components as ''Beta Delphini A'' and ''B'' derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). Beta Delphini bore an historical name, ''Rotanev'', which arose as follows: Niccolò Cacciatore was the assistant to Giuseppe Piazzi, and later his successor as Director of the Palermo Observatory. The name first appeared in Piazzi's Palermo Star Catalogue. When the Catalogue was published in 1814, the unfamiliar n ... [...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] |
18 Delphini
18 Delphini, also named Musica , is a single star in the constellation of Delphinus of the low northern hemisphere. It has a Sun-like golden hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.506. The star is located at a distance of approximately 249 light years from the Sun based on parallax, and it is drifting further away with a radial velocity of +4 km/s. An object believed to be an extrasolar planet (designated 18 Delphini b or Arion) orbits the star. Nomenclature 18 Delphini is the star's Flamsteed designation, abbreviated 18 Del. Following its discovery the planet was designated 18 Delphini b. As part of the NameExoWorlds program by the International Astronomical Union, in 2015 the name Musica, Latin for 'music', was selected for this star by Tokushima Prefectural Jonan High School Science Club of Japan. The planet was given the name Arion, after a genius of poetry and music in ancient Greece. According to legend, his life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emptiness (Chinese Constellation)
The Emptiness mansion () is one of the Twenty-eight mansions of the Chinese constellations. It is one of the northern mansions of the Black Tortoise The Black Tortoise () is one of the Four Symbols of the Chinese constellations. Despite its English name, it is usually depicted as a tortoise entwined together with a snake. The name used in East Asian languages does not mention either anima .... Asterisms {{DEFAULTSORT:Emptiness (Chinese Constellation) Chinese constellations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma1 Delphini
Gamma Delphini, which is Latinized from γ Delphini, is a wide binary star system in the northern constellation of Delphinus. The star marks one corner of the asterism " Job's Coffin". The pair can be split with a modest amateur telescope and have been described as "one of the prettier pairs in the sky", with their contrasting colors said to be orange and lime in appearance. Together, the system is visible to the naked eye with a combined apparent visual magnitude of 3.87. Space motion The system is located at a distance of 115 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −7 km/s. It is a member of the thin disk population, and is a proposed member of the Wolf 630 moving group. This star was found to be a double by Christian Mayer and later observed by William Herschel on Sept 27th, 1779. It was later included as STF 2727 in the catalogue compiled by F. G. W. Struve and can be found under this name in the Was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD 196775
HD 196775 (HR 7899) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.98, allowing it to be faintly seen with the naked eye. The object is relatively far at a distance of 1,050 light years but is approaching the Solar System with a heliocentric radial velocity of . HD 196775 has a high peculiar velocity of compared to neighboring stars, indicating that it may be a runaway star. HD 196775 has a general stellar classification of B3 V, indicating that it is an ordinary B-type main-sequence star. However, once source gives it a class of B4 Vn, making it slightly cooler and having broad absorption lines due to rapid rotation. It has an angular diameter of , yielding a radius 4.13 times that of the Sun. At present it has 7 times the mass of the Sun and shines at from its photosphere at an effective temperature of , giving it a whitish blue hue. HD 196775 is 36 million years old and is spinning rapidly with a projected rotational ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
17 Delphini
17 Delphini is a solitary star in the equatorial constellation Delphinus. It has an absolute magnitude of −0.64 and apparent magnitude of 5.18, allowing it to be faintly seen with the naked eye. Located 517 light years away, it is approaching the Solar System with a heliocentric radial velocity of . 17 Delphini is an orange giant that is most likely on the horizontal branch (84% probability). At present it has 2.33 times the mass of the Sun, but at an age of 832 million years — has expanded to 23.36 times the radius of the Sun. It shines at from its enlarged photosphere at an effective temperature of 4,616 K, giving it an orange glow. 17 Del has an iron abundance 64% that of the Sun and spins modestly with a projected rotational velocity of . 17 Del is suspected to be a variable star A variable star is a star whose brightness as seen from Earth (its apparent magnitude) changes with time. This variation may be caused by a change in emitted light or by something ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
16 Delphini
16 Delphini is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.54, making it faintly visible to the naked eye. The star is relatively close at a distance of 198 light years but is receding with a poorly constrained radial velocity of . 16 Delphini is a chemically peculiar A-type main-sequence star with a stellar classification of A5 V. It has twice the Sun's mass, 1.9 times it's radius, and shines at . This yields an effective temperature of 9,039 K, giving it a white glow. 16 Del is 400 million years old – 56.5% through its main sequence lifetime – and spins rapidly with a projected rotational velocity of . 16 Del has a companion that was first discovered by John Herschel and was even noted to be a spectroscopic binary A binary star is a system of two star, stars that are gravity, gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15 Delphini
15 Delphini (15 Del) is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.99, allowing it to be faintly seen with the naked eye. The star is relatively close at a distance of 99 light years but is receding with a heliocentric radial velocity of . 15 Del has a stellar classification of F5 V, indicating that it is an ordinary F-type main-sequence star. It has 123% the mass of the Sun and a diameter of . It radiates at 3 times the luminosity of the Sun from its photosphere at an effective temperature of , giving a yellow-white hue. 15 Del has an iron abundance 74% that of the Sun and at an age of 1.21 billion years — spins leisurely with a projected rotational velocity of . 15 Delphini has 3 companions listed below. Components B and D have different proper motion Proper motion is the astrometric measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10 Delphini
10 Delphini (10 Del) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.00, allowing it to be faintly seen with the naked eye. Parallax measurements put the object at a distance of 493 light years but is drifting closer with a heliocentric radial velocity of . 10 Delphini has a stellar classification of K4 III or K2 III, both indicating that it is a red giant. However, there is some uncertainty behind the first classification. It has twice the mass of the Sun but at an age of 794 million years — expanded to 18 times the radius of the Sun. It shines at from its enlarged photosphere at an effective temperature of 4,378 K, giving it an orange glow. 10 Del has a solar metallicity In astronomy, metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium. Most of the normal physical matter in the Universe is either hydrogen or helium, and astronomers use the word ''"metals"'' as a .... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
