Gamma Pyxidis
 Location of γ Pyxidis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pyxis |
| Right ascension | 08h 50m 31.9233s[1] |
| Declination | −27° 42′ 35.440″[1] |
| Apparent magnitude (V) | 4.026[2] |
| Characteristics | |
| Spectral type | K3III[2] |
| U−B color index | +1.368[3] |
| B−V color index | +1.284[3] |
| Astrometry | |
| Radial velocity (Rv) | 24.5 km/s |
| Proper motion (μ) | RA: −134.31[4] mas/yr Dec.: 87.89[4] mas/yr |
| Parallax (π) | 15.73 ± 0.17[4] mas |
| Distance | 207 ± 2 ly (63.6 ± 0.7 pc) |
| Details | |
| Luminosity | 178[5] L☉ |
| Surface gravity (log g) | 2.35[6] cgs |
| Temperature | 4,270[6] K |
| Metallicity [Fe/H] | -0.05[6] dex |
| Other designations | |
Gamma Pyxidis (Gamma Pyx, γ Pyxidis, γ Pyx) is a 4th magnitude star in the constellation Pyxis. It is classified as a giant star of composition similar to the Sun[7] with an estimated diameter 3.7 times that of the Sun.[8] It is located an estimated 207 light years from the Solar System.[4]
Gamma Pyxidis is moving through the Galaxy at a speed of 54.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,300 and 30,700 light years from the center of the Galaxy.[9]
Naming
In Chinese, 天狗 (Tiān Gǒu), meaning Celestial Dog, refers to an asterism consisting of γ Pyxidis, e Velorum, f Velorum, β Pyxidis, α Pyxidis and δ Pyxidis. Consequently, γ Pyxidis itself is known as 天狗六 (Tiān Gǒu liù, English: the Sixth Star of Celestial Dog.)[10]
References
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Gamma Pyxidis (HIP 43409)
- ↑ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 17 日
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