Struve 1694 (Σ 1694, Struve 1694) is a

double star In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes. This occurs because the pair either forms a binary star (i.e. a bi ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Camelopardalis Camelopardalis is a large but faint constellation of the northern sky representing a giraffe. The constellation was introduced in 1612 or 1613 by Petrus Plancius. Some older astronomy books give Camelopardalus or Camelopardus as alternative for ...

. Σ 1694 is a

, with components of magnitudes 5.3^m and 5.9^m: *Σ 1694A ( HD 112028) is a white A-type giant star with an apparent magnitude of 5.28^m. It is approximately 300 light years from Earth. *Σ 1694B ( HD 112014) is 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 resolved using a telescope as separa ...

consisting of two A-type

main sequence In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Her ...

stars. Norton's Star Atlas describes the pair as yellowish and bluish. Σ 1694 was also known as 32H. Camelopardalis, Hevelius' 32nd of Camelopardalis. It is not

Flamsteed John Flamsteed (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal. His main achievements were the preparation of a 3,000-star catalogue, ''Catalogus Britannicus'', and a star atlas called ''Atlas Coe ...

's "32 Camelopardalis", which is ξ Aurigae. In the ''British Association Catalogue'', the star pair are listed as being in Ursa Minor.

Chinese name

Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of va ...

, (), meaning '' North Pole'', refers to an asterism consisting of Σ 1694, γ Ursae Minoris, β Ursae Minoris,

5 Ursae Minoris 5 Ursae Minoris is a star in the circumpolar constellation of Ursa Minor. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.253. The distance to this star, as determined from an annual parallax shift o ...

and

4 Ursae Minoris 4 Ursae Minoris is a binary star system in the northern circumpolar constellation Ursa Minor. It is faintly visible to the naked eye with an apparent visual magnitude of 4.80. Based upon an annual parallax shift of as seen from Earth's ...

. Consequently, Σ 1694 itself is known as (, en, the Fifth Star of North Pole.), representing (), meaning ''Celestial Pivot''.香港太空館 - 研究資源 - 亮星中英對照表
, Hong Kong Space Museum. Accessed on line November 23, 2010. This star was regarded as the north star by the Chinese people from Han Dynasty to Song Dynasty.

References

{{DEFAULTSORT:Struve 1694 112028 Struve 1694