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Dorado In Chinese Astronomy
The modern constellation Dorado is not included in the Three Enclosures and Twenty-Eight Mansions system of traditional Chinese uranography because its stars are too far south for observers in China to know about them prior to the introduction of Western star charts. Based on the work of Xu Guangqi and the German Jesuit missionary Johann Adam Schall von Bell in the late Ming Dynasty, this constellation has been classified under the 23 Southern Asterisms (近南極星區, ''Jìnnánjíxīngōu'') with the names White Patches Attached (夾白, ''Jiābái'') and Goldfish (金魚, ''Jīnyú''). The name of the western constellation in modern Chinese is 劍魚座 (''jiàn yú zuò''), meaning "the swordfish constellation". Stars The map of Chinese constellation in constellation Dorado 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 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorado
Dorado () is a constellation in the southern sky. It was named in the late 16th century and is now one of the 88 modern constellations. Its name refers to the dolphinfish (''Coryphaena hippurus''), which is known as ''dorado'' in Spanish, although it has also been depicted as a swordfish. Dorado contains most of the Large Magellanic Cloud, the remainder being in the constellation Mensa. The South Ecliptic pole also lies within this constellation. Even though the name Dorado is not Latin but Spanish, astronomers give it the Latin genitive form ''Doradus'' when naming its stars; it is treated (like the adjacent asterism Argo Navis) as a feminine proper name of Greek origin ending in -ō (like ''Io'' or ''Callisto'' or ''Argo''), which have a genitive ending ''-ūs''. History Dorado was one of twelve constellations named by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. It appeared: * On a celestial globe published in 1597 (or 1598) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Doradus
Theta Doradus, Latinized from θ Doradus, is a solitary star in the southern constellation of Dorado. Based upon an annual parallax shift of 6.64 mas as seen from Earth, it is located around 490 light years from the Sun. With an apparent visual magnitude of +4.82, the star is bright enough to be faintly visible to the naked eye. This is an evolved orange-hued K-type giant star with a stellar classification of , where the suffix indicates it is a chemically peculiar star with a strong CN band. With an age of around 1.17 billion years, it has an estimated 2.23 times the mass of the Sun and has expanded to about 16 times the Sun's radius. It is radiating 426.6 times the solar luminosity from its photosphere at an effective temperature of 4,320 K. Naming In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, (), meaning '' White Patches Attached'', refers to an asterism consisting of θ Dora ... [...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] |
Eta2 Doradus
Eta2 Doradus, Latinized from η2 Doradus, is a star in the southern constellation of Dorado. It is visible to the naked eye as a dim, reddish star with an apparent visual magnitude of 5.01 It is about 580 light years from the Sun as shown by parallax, and its net movement is one of receding, having a radial velocity of +34.5 km/s. It is circumpolar south of latitude S. This object is an M-type giant star, with its stellar classification being M2.5III. It has left the main sequence after exhausting its core hydrogen and expanded to around . The star is radiating about 1200 times the Sun's luminosity from its photosphere, at an effective temperature of 3726 K. References External links * 2004. Starry Night Pro, Version 5.8.4. Imaginova Imaginova Corporation is a U.S. digital commerce company based in Watsonville, California. The company, which was started in 1999 as "Space.com" by CNN business anchor Lou Dobbs, later became known as Space H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta Doradus
δ Doradus (often Latinised to Delta Doradus, abbreviated to δ Dor or delta Dor) is a star in the southern constellation of Dorado. Based upon an annual parallax shift of 21.80 mas as seen from Earth, it is located around 150 light years from the Sun. The star is visible to the naked eye with an apparent visual magnitude of +4.34. This is an A-type main sequence star with a stellar classification of A7 V. The star is spinning rapidly with a projected rotational velocity of 172 km/s. This is giving the star an oblate shape with an equatorial bulge that is 12% larger than the polar radius. Although A-type stars are not expected to harbor a magnetic dynamo needed to power X-ray emission, an X-ray flux of has been detected at these coordinates. This may indicate that the star has an unseen companion. δ Doradus displays an infrared excess suggesting it may be a Vega-like star with an orbiting debris disk. Currently this star is the Moon's south pole st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
