Upsilon Draconis

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Upsilon Draconis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Draco
Right ascension 18h 54m 23.85632s [1]
Declination +71° 17′ 49.8906″ [1]
Spectral type K0III [1]

Upsilon Draconis (υ Dra) is a star in the constellation Draco. Its apparent magnitude is 4.80.

In Chinese, 紫微左垣 (Zǐ Wēi Zuǒ Yuán), meaning Left Wall of Purple Forbidden Enclosure, refers to an asterism consisting of υ Draconis, ι Draconis, η Draconis, ζ Draconis, θ Draconis, 73 Draconis, γ Cephei and 23 Cassiopeiae.[2] Consequently, ζ Draconis itself is known as 紫微左垣五 (Zǐ Wēi Zuǒ Yuán wu, English: the Fifth Star of Left Wall of Purple Forbidden Enclosure.),[3] representing 少弼 (Shǎobì), meaning The Second Minister.


  1. ^ a b c SIMBAD, Upsilon Draconis (accessed 27 August 2012)
  2. ^ (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.
  3. ^ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 10 日