Liu Xin
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Categories: Year of birth unknown | 23 deaths | Han Dynasty politicians | Ancient Chinese historians | Ancient Chinese astronomers | Chinese academic biography stubs | Astronomer stubs | Historian stubs
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For the Western Han Dynasty emperor named Liu Xin, see Emperor Ai of Han; not to be confused with Emperor Guangwu of Han, also named Liu Xiu.
Liu Xin (traditional Chinese: 劉歆; simplified Chinese: 刘歆; Wade-Giles: Liu Hsin) (?? – 23), later changed name to Liu Xiu (劉秀), courtesy name Zijun (子駿), was a Chinese astronomer and historian during the Xin Dynasty. The son of the Confucian scholar Liu Xiang, he created a new astronomical system, called "Triple Concordance". He published this system in the year 8 as section of his textbook. In it he provided the following periods:
Therefore his number of days in one year was 365.25016, which is 11 minutes longer than the current value. He also created a catalog of 1080 stars, where he used the scale of 6 magnitudes. He also calculated periods for planets. A crater on Mars was named in his honor. References
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