Noctua (constellation)

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Card 32 of Urania's Mirror depicts Noctua the owl, perched on the tail of Hydra, the serpent. Sidney Hall - Urania's Mirror - Noctua, Corvus, Crater, Sextans Uraniae, Hydra, Felis, Lupus, Centaurus, Antlia Pneumatica, Argo Navis, and Pyxis Nautica (whole card).jpg
Card 32 of Urania's Mirror depicts Noctua the owl, perched on the tail of Hydra, the serpent.

Noctua (Latin: owl ) was a constellation near the tail of Hydra in the southern celestial hemisphere, but is no longer recognized. [1] It was introduced by Alexander Jamieson in his 1822 work, A Celestial Atlas , and appeared in a derived collection of illustrated cards, Urania's Mirror . [2] Now designated Asterism a, the owl was composed of the stars Sigma Librae, 4 Librae and 54–57 Hydrae, which range from 3rd to 6th magnitude. [3] [4]

The French astronomer Pierre Charles Le Monnier had introduced a bird on Hydra's tail as the constellation Solitaire, named for the extinct flightless bird, the Rodrigues solitaire, but the image was that of a rock thrush which had been classified in the genus Turdus , giving rise to the constellation name Turdus Solitarius, the solitary thrush. It has also been depicted as a mockingbird. [4] The boundaries of the constellation were defined as longitude 0° to 26°30' and from the ecliptic to 15° S. [1]

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Chinese star names are named according to ancient Chinese astronomy and astrology. The sky is divided into star mansions and asterisms. The system of 283 asterisms under the 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 is referred to as .

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Urania's Mirror; or, a view of the Heavens is a set of 32 astronomical star chart cards, first published in November 1824. They are illustrations based on Alexander Jamieson's A Celestial Atlas, but the addition of holes punched in them allow them to be held up to a light to see a depiction of the constellation's stars. They were engraved by Sidney Hall, and were said to be designed by "a lady", but have since been identified as the work of the Reverend Richard Rouse Bloxam, an assistant master at Rugby School.

References

  1. 1 2 Bakich, Michael E. (22 June 1995). The Cambridge Guide to the Constellations . Cambridge University Press. pp.  45–47. ISBN   978-0-521-44921-2.
  2. Kanas, Nick (5 June 2012). Star Maps: History, Artistry, and Cartography. Springer Science & Business Media. pp. 185–6. ISBN   978-1-4614-0917-5.
  3. O'Meara, Steve (14 June 2007). Herschel 400 Observing Guide. Cambridge University Press. p. 192. ISBN   978-0-521-85893-9.
  4. 1 2 Ian Ridpath (1988). Star Tales. James Clarke & Co. p. 151. ISBN   978-0-7188-2695-6.