Alpha2 Capricorni
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 20h 18m 03.3s |
| Declination | −12° 32′ 41″ |
| Apparent magnitude (V) | +3.58 |
| Absolute magnitude (V) | +0.98+0.07 −0.06[1] |
| Distance | 109±3 ly (33±1 pc) |
| Spectral type | G8 IIIb |
| Other designations | |
- For other star systems with this Bayer designation, see Alpha Capricorni.
Alpha2 Capricorni (α2 Cap, α2 Capricorni) is a star in the constellation Capricornus. It also has the traditional star name Secunda Giedi or Algiedi Secunda, and shares the name Algedi (from الجدي - al-jadii, meaning the goat) with α¹ Capricorni.
In Chinese, 牛宿 (Niú Su), meaning Ox (asterism), refers to an asterism consisting of α² Capricorni, β Capricorni, ξ2 Capricorni, π Capricorni, ο Capricorni and ρ Capricorni.[2] Consequently, α² Capricorni itself is known as 牛宿二 (Niú Su èr, English: the Second Star of Ox.)[3]
α2 Capricorni is a yellow G-type giant with an apparent magnitude of +3.58. It is approximately 109 light years from Earth.
References
- ↑ Carney, Bruce W.; et al. (March 2008), "Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars", The Astronomical Journal 135 (3): 892–906, arXiv:0711.4984, Bibcode:2008AJ....135..892C, doi:10.1088/0004-6256/135/3/892
- ↑ (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) 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.
External links
- Kaler, Jim (2005). "Algedi". Retrieved July 27, 2005.
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