Tau Orionis
| Observation data Epoch {{{epoch}}} Equinox | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 17m 08.28s |
| Declination | −06° 50′ 39.8″ |
| Apparent magnitude (V) | 3.59 |
| Characteristics | |
| Spectral type | B5III |
| Astrometry | |
| Distance | 555 ly |
| Other designations | |
HD 34503, HIP 24674, SAO 131952, BD B-07 1028 | |
Tau Orionis (τ Ori, τ Orionis) is a star in the constellation Orion.
This star, along with β Eri, λ Eri and ψ Eri were Al Kursiyy al Jauzah, "the Chair (or "Footstool") of the Central One"[1]
According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Kursiyy al Jauzah were the title for three stars :β Eri as Cursa, ψ Eri as Al Kursiyy al Jauzah I and λ Eri as Al Kursiyy al Jauzah II (exclude this star)[2]
In Chinese, 玉井 (Yù Jǐng), meaning Jade Well, refers to an asterism consisting of τ Orionis, β Eridani, λ Eridani and ψ Eridani.[3] Consequently, τ Orionis itself is known as 玉井四 (Yù Jǐng sì, English: the Fourth Star of Jade Well.).[4] From this Chinese name, the name Yuh Tsing was appeared[5]
Properties
Tau Orionis has an apparent magnitude of 3.59, meaning it is visible to the naked eye, and belongs to the spectral class B5III. If an imaginary line is drawn north-west between the stars Rigel and Mintaka, Tau Orionis can be found roughly one-sixth of the way to Mintaka.
References
- ↑ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York, NY: Dover Publications Inc. p. 218. ISBN 0-486-21079-0. Retrieved 2010-12-12.
- ↑ Jack W. Rhoads - Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars, Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971
- ↑ (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 7 月 15 日
- ↑ Richard Hinckley Allen: Star Names — Their Lore and Meaning: Orion
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