Tau Aurigae
From Infogalactic: the planetary knowledge core
 The location of τ Aurigae (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 49m 10.43826s[1] |
| Declination | +39° 10′ 51.8627″[1] |
| Apparent magnitude (V) | 4.505[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| U−B color index | +0.692[2] |
| B−V color index | +0.956[2] |
| R−I color index | 0.49 |
| Astrometry | |
| Radial velocity (Rv) | –19.32 ± 0.19[4] km/s |
| Proper motion (μ) | RA: –28.30[1] mas/yr Dec.: –24.97[1] mas/yr |
| Parallax (π) | 15.77 ± 0.20[1] mas |
| Distance | 207 ± 3 ly (63.4 ± 0.8 pc) |
| Details | |
| Radius | 11[4] R☉ |
| Luminosity | 63[4] L☉ |
| Surface gravity (log g) | 2.7[4] cgs |
| Temperature | 4,887[4] K |
| Metallicity [Fe/H] | –0.27[4] dex |
| Rotational velocity (v sin i) | 3.8[4] km/s |
| Other designations | |
Tau Aurigae (τ Aur, τ Aurigae) is the Bayer designation for a star in the constellation Auriga. It is visible to the naked eye with an apparent visual magnitude of 4.505,[2] and is approximately 207 light-years (63 parsecs) distant from Earth. This is an evolved giant star with a stellar classification of G8 III.[3] It has expanded to 11 times the radius of the Sun and shines with 63 times the Sun's luminosity. This energy is radiated into outer space from the outer atmosphere at an effective temperature of 4,887.[4] This heat gives it the yellow-hued glow of a G-type star.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found. Note: see VizieR catalogue I/311.
- ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
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