Theta Piscium
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 Location of θ Piscium(circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 23h 27m 58.0951s |
| Declination | +6° 22′ 44.372″ |
| Apparent magnitude (V) | 4.27[2] |
| Characteristics | |
| Spectral type | K1 III[2] |
| U−B color index | +1.00 |
| B−V color index | +1.062[2] |
| Astrometry | |
| Radial velocity (Rv) | +6.05 ± 0.19[2] km/s |
| Proper motion (μ) | RA: -123.83 mas/yr Dec.: -43.26 mas/yr |
| Parallax (π) | 20.54 ± 0.80 mas |
| Distance | 159 ± 6 ly (49 ± 2 pc) |
| Details | |
| Mass | 1.54[2] M☉ |
| Other designations | |
Theta Piscium (Theta Psc, θ Piscium, θ Psc) is a star approximately 159 light years away from Earth in the constellation Pisces. It is an orange-red star of the spectral type K1III, meaning it is a normal giant star with a surface temperature of 3,500 to 5,000 kelvins, and is brighter yet cooler than our sun.[3]
Naming
In Chinese, 霹靂 (Pī Lì), meaning Thunderbolt, refers to an asterism consisting of refers to an asterism consisting of θ Piscium, β Piscium, γ Piscium, ι Piscium and ω Piscium. Consequently, θ Piscium itself is known as 霹靂三 (Pī Lì sān, English: the Third Star of Thunderbolt.)[4]
References
- ↑ "Simbad Query Result". Simbad. Retrieved September 27, 2007.
- ↑ 2.0 2.1 2.2 2.3 2.4 Hekker, S. et al. (August 2006), "Precise radial velocities of giant stars. I. Stable stars", Astronomy and Astrophysics 454 (3): 943–949, arXiv:astro-ph/0604502, Bibcode:2006A&A...454..943H, doi:10.1051/0004-6361:20064946
- ↑ ""Hipparcos Star Catalog Entry"". Retrieved September 27, 2007.
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 8 日
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