Upsilon Piscium
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 19m 27.9951s |
| Declination | +27° 15' 50.611" |
| Apparent magnitude (V) | 4.752 |
| Characteristics | |
| Spectral type | A3V |
| U−B color index | +0.10 |
| B−V color index | +0.03 |
| Astrometry | |
| Radial velocity (Rv) | 8.0 km/s |
| Proper motion (μ) | RA: 26.21 mas/yr Dec.: -11.62 mas/yr |
| Parallax (π) | 10.49 ± 0.77 mas |
| Distance | 310 ± 20 ly (95 ± 7 pc) |
| Other designations | |
Upsilon Piscium (Upsilon Psc, υ Piscium, υ Psc) is a star approximately 310 light years away from Earth, in the constellation Pisces. It is bluish-white star of the spectral type A3V. It has a surface temperature of 7,500 to 11,000 kelvins, and is approximately the same size as the Sun, yet is much hotter and brighter. It has a rotational velocity of 93 kilometers per second at the equator.[2]
Naming
In Chinese, 奎宿 (Kuí Sù), meaning Legs (asterism), refers to an asterism consisting of refers to an asterism consisting of υ Piscium, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, ν Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, φ Piscium, χ Piscium and ψ¹ Piscium. Consequently, υ Piscium itself is known as 奎宿十三 (Kuí Sù shí sān, English: the Thirteenth Star of Legs.)[3]
References
- ↑ "Simbad Query Result". Simbad. Retrieved October 1, 2007.
- ↑ "upsilon Piscium". Retrieved October 1, 2007.
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日