Nu Piscium
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 41m 25.8943s |
| Declination | +5° 29' 15.408" |
| Apparent magnitude (V) | 4.448 |
| Characteristics | |
| Spectral type | K3IIIb |
| U−B color index | +1.56 |
| B−V color index | +1.36 |
| Astrometry | |
| Radial velocity (Rv) | 0.4 km/s |
| Proper motion (μ) | RA: -22.73 mas/yr Dec.: 3.61 mas/yr |
| Parallax (π) | 8.86 ± 0.77 mas |
| Distance | 370 ± 30 ly (113 ± 10 pc) |
| Details | |
| Mass | 1.9[1] M☉ |
| Radius | 34 ± 3[2] R☉ |
| Other designations | |
Nu Piscium (Nu Psc, ν Piscium, ν Psc) is a star approximately 368 light years away from Earth, in the constellation Pisces. It is an orange star of the spectral type K3IIIb, meaning it possesses a surface temperature between 3,500 and 5,000 kelvins. It is a giant star, cooler in surface temperature than the Sun, yet larger and brighter.[4]
Nu Piscium was a latter designation of 51 Ceti.[5]
Naming
In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism consisting of refers to an asterism consisting of ν Piscium, δ Piscium, ε Piscium, ζ Piscium, μ Piscium, ξ Piscium and α Piscium. Consequently, ν Piscium itself is known as 外屏五 (Wài Píng wu, English: the Fifth Star of Outer Fence.)[6]
References
- ↑ Gondoin, P. (December 1999), "Evolution of X-ray activity and rotation on G-K giants", Astronomy and Astrophysics, 352: 217–227, Bibcode:1999A&A...352..217G
- ↑ Nordgren, Tyler E.; et al. (December 1999), "Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer", The Astronomical Journal, 118 (6): 3032–3038, Bibcode:1999AJ....118.3032N, doi:10.1086/301114
- ↑ "Simbad Query Result". Simbad. Retrieved September 30, 2007.
- ↑ "Hipparcos Star Catalog Entry". Retrieved October 1, 2007.
- ↑ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy, Vol.18, NO. 3/AUG, P.209, 1987. 18: 215. Bibcode:1987JHA....18..209W.
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
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