Epoch J2000.0 Equinox J2000.0
|Apparent magnitude (V)||+5.08|
|Distance||670 ± 110 ly
(204 ± 33 pc)
Pi Capricorni (π Cap, π Capricorni) is a double star in the constellation Capricornus. It also has the traditional star name Okul or Oculus (meaning eye in Latin). It is approximately 670 light years from Earth.
In Chinese, 牛宿 (Niú Su), meaning Ox (asterism), refers to an asterism consisting of π Capricorni, β Capricorni, α2 Capricorni, ξ2 Capricorni, ο Capricorni and ρ Capricorni. Consequently, π Capricorni itself is known as 牛宿四 (Niú Su sì, English: the Fourth Star of Ox.)
The primary component, π Capricorni A, is a blue-white B-type bright giant with an apparent magnitude of +5.08. It is a spectroscopic binary whose two components are separated by 0.1 arcseconds. The third component, π Capricorni B, is an eighth magnitude star 3.4 arcseconds from the primary.
- (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.
- (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 13 日
- Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
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