Tianguan

In Chinese Astronomy, Tianguan (Chinese: zh 天关, pinyin: tiān guān), meaning “carries celestial” is a Astérisme, in fact made up of only one star, ζ Tauri. It is the only star of Magnitude visual lower or equal to 3 in a ray of more than five degrees, which explains why the asterism does not consist of more stars.

Sources

  • the treaty of Astronomy Jinshu (compiled by Li Shunfeng towards the mileu of the 7th century) described Tianguan thus (chapter 11):

a single, known star under the name of Tianguan or Tianmen is located at the south of Wuche , on the way of the Sun and the the Moon.
  • the poem Butian Ge gives following description of it:
the star isolated from Tianguan is with the foot of [Wu] che the lunar house directly below Tianguan is called [Zui] xi .

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