| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Scorpius |
| Right ascension | 16h 50m 09.8s |
| Declination | -34° 17′ 36″ |
| Apparent magnitude (V) | 2.29 |
| Characteristics | |
| Spectral type | K2 IIIb |
| U-B color index | 1.27 |
| B-V color index | 1.15 |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | -3 km/s |
| Proper motion (μ) | RA: -611.83 mas/yr Dec.: -255.87 mas/yr |
| Parallax (π) | 49.85 ± 0.81 mas |
| Distance | 65 ± 1 ly (20.1 ± 0.3 pc) |
| Absolute magnitude (MV) | 0.78 |
| Other designations | |
Epsilon Scorpii (ε Sco / ε Scorpii) is a star in the constellation Scorpius. It is rarely called Wei introduced by Patrick Moore[1]. The name Wěi (尾), the Tail, was originally given for a Chinese asterism or Xiù composed from the stars ε, μ1-2, ζ1-2, η,θ, ι, κ, υ, and λ Scorpii[2].
Notes
- ^ Moore, P., (1983) The Guinness Book of Astronomy: Facts & Feats, (2nd. ed.), Guinness Superlatives Limited, Middlesex, p.242.
- ^ Allen, R. H., (1899) Star-Names and Their Meanings, G. E. Stechert, New York, p.369.
See also
- Wěi Xiù (尾宿): The 6th Chinese lunar mansion.
- Mycon: fictional alien species in the computer game Star Control whose homeworld is Epsilon Scorpii
