HD 173791
| Observation data Epoch J2000 Equinox |
|
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 49m 27.34329s[1] |
| Declination | –45° 48′ 36.3665″[1] |
| Apparent magnitude (V) | 5.802 |
| Characteristics | |
| Evolutionary stage | Giant |
| Spectral type | G8 III[2] |
| Astrometry | |
| Radial velocity (Rv) | 9.7[3] km/s |
| Proper motion (μ) | RA: 73.85[1] mas/yr Dec.: 56.57[1] mas/yr |
| Parallax (π) | 9.10 ± 0.31[1] mas |
| Distance | 360 ± 10 ly (110 ± 4 pc) |
| Absolute magnitude (MV) | 0.201 |
| Details | |
| Mass | 1[4] M☉ |
| Radius | 3.0[5] R☉ |
| Temperature | 5,200[4] K |
| Other designations | |
HD 173791 (30 G. Telescopium) is a giant star in the constellation Telescopium, located about 358 light-years (110 parsecs) from Earth. It has an apparent magnitude of +5.8, allowing it to be viewed with the naked eye under suitable viewing conditions. The stellar classification is G8III, which indicates that it has evolved from a main sequence star and has expanded into a giant with three times the Sun's radius.[5] The effective temperature of its chromosphere is 5,200 K,[4] giving it the characteristic yellow hue of a G-type star.[8]
It has an estimated lifespan of 10 billion years and has about the same mass as the Sun. After passing through the giant stage, its end state will probably be a carbon-oxygen white dwarf.[4]
References
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- ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found. Note: see VizieR catalogue J/A+A/367/521.
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