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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h39m53.2s |
| Declination | −53°27′59″ |
| Apparent magnitude (V) | +2.29 |
| Characteristics | |
| Spectral type | B1III |
| U−B color index | −0.92 |
| B−V color index | −0.22 |
| Variable type | Beta Cephei |
| Astrometry | |
| Radial velocity (Rv) | +3 km/s |
| Proper motion (μ) | RA: −14.60 mas/yr Dec.: −12.79 mas/yr |
| Parallax (π) | 8.68 ± 0.77 mas |
| Distance | 380 ± 30 ly (120 ± 10 pc) |
| Absolute magnitude (MV) | −3.02 |
| Other designations | |
| Database references | |
| SIMBAD | data |
Epsilon Centauri (ε Cen, ε Centauri) is a star in the constellation Centaurus.
In Chinese, 南門 (Nán Mén), meaning Southern Gate, refers to an asterism consisting of ε Centauri and α Centauri.[1] Consequently, ε Centauri itself is known as 南門一 (Nán Mén yī, English: the First Star of Southern Gate.)[2]
ε Centauri is a blue-white B-type giant with a mean apparent magnitude of +2.29. It is classified as a Beta Cephei type variable star and its brightness varies from magnitude +2.29 to +2.31 with a period of 4.07 hours.
[edit] See also
- ^ (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 25 日
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