Theta Piscis Austrini
 Location of θ Piscis Austrini (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Piscis Austrinus |
| Right ascension | 21h 47m 44.150s[1] |
| Declination | –30° 53′ 53.90″[1] |
| Apparent magnitude (V) | +5.02 |
| Characteristics | |
| Spectral type | A1V + A1V[2] |
| Astrometry | |
| Proper motion (μ) | RA: –34.40 ± 0.34[1] mas/yr Dec.: –0.08 ± 0.33[1] mas/yr |
| Parallax (π) | 11.17 ± 0.41[2] mas |
| Distance | 290 ± 10 ly (90 ± 3 pc) |
| Details | |
| Other designations | |
Theta Piscis Austrini (Theta PsA, θ Piscis Austrini, θ PsA) is multiple star system in constellation of Piscis Austrinus, with an apparent magnitude of +5.02. The primary component is a white A-type main sequence star. It is approximately 290 light years from Earth.[2]
Theta Piscis Austrini is moving through the Galaxy at a speed of 21.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,600 and 38,300 light years from the center of the Galaxy.[4]
Theta Piscis Austrini came closest to the Sun 2.7 million years ago when it had brightened to magnitude 4.54 from a distance of 256 light years.[4]
Naming
In Chinese, 天錢 (Tiān Qián), meaning Celestial Money, refers to an asterism consisting of refers to an asterism consisting of θ Piscis Austrini, 13 Piscis Austrini, ι Piscis Austrini, μ Piscis Austrini and τ Piscis Austrini. Consequently, θ Piscis Austrini itself is known as 天錢二 (Tiān Qián èr, English: the Second Star of Celestial Money.)[5]
References
- ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Theta Piscis Austrini (HIP 107608)
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 5 日
