Struve 1694

Struve 1694 (Σ 1694, Struve 1694) is a double star in the constellation Camelopardalis.[1]

Position of Σ 1694 (circled)

Σ 1694 is a double star, 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 consisting of two A-type main sequence stars.

Norton's Star Atlas describes the pair as yellowish and bluish.[1]

Σ 1694 was also known as 32H. Camelopardalis, Hevelius' 32nd of Camelopardalis. It is not Flamsteed's "32 Camelopardalis", which is ξ Aurigae. In the British Association Catalogue, the star pair are listed as being in Ursa Minor.[2]

Chinese name

In Chinese, 北極 (Běi Jí), meaning North Pole, refers to an asterism consisting of Σ 1694, γ Ursae Minoris, β Ursae Minoris, 5 Ursae Minoris and 4 Ursae Minoris.[3] Consequently, Σ 1694 itself is known as 北極五 (Běi Jí wǔ, English: the Fifth Star of North Pole.),[4] representing 天樞 (Tiānshū), meaning Celestial Pivot.[5]

This star was regarded as the north star by the Chinese people from Han Dynasty to Song Dynasty.[6]

References

Norton, Arthur P. (1973). Norton's Star Atlas. p. 118. ISBN 0-85248-900-5.
British Association for the Advancement of Science; Francis Baily (1845). The Catalogue of Stars of the British Association for the Advancement of Science: Containing the Mean Right Ascensions and North Polar Distances of Eight Thousand Three Hundred and Seventy-seven Fixed Stars, Reduced to January 1, 1850: Together with Their Annual Precessions, Secular Variations and Proper Motions, as Well as the Logarithmic Constants for Computing Precession, Aberration and Nutation. With a Preface Explanatory of Their Construction and Application. R. and J. E. Taylor.
(in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
(in Chinese) 天樞 (北極)
(in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2010-08-10 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
https://kknews.cc/finance/9ymy2gb.html The North Star That You Don't Know

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[Nor-1] Norton, Arthur P. (1973). Norton's Star Atlas. p. 118. ISBN 0-85248-900-5.

[bac-2] British Association for the Advancement of Science; Francis Baily (1845). The Catalogue of Stars of the British Association for the Advancement of Science: Containing the Mean Right Ascensions and North Polar Distances of Eight Thousand Three Hundred and Seventy-seven Fixed Stars, Reduced to January 1, 1850: Together with Their Annual Precessions, Secular Variations and Proper Motions, as Well as the Logarithmic Constants for Computing Precession, Aberration and Nutation. With a Preface Explanatory of Their Construction and Application. R. and J. E. Taylor.

[3] (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.

[4] (in Chinese) 天樞 (北極)

[5] (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2010-08-10 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.

[6] ttps://kknews.cc/finance/9ymy2gb.html The North Star That You Don't Know