Sigma Aurigae
From Infogalactic: the planetary knowledge core
 The location of σ Aurigae (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 24m 39.14261s[1] |
| Declination | +37° 23′ 07.2494″[1] |
| Apparent magnitude (V) | 4.99[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| U−B color index | +1.75[2] |
| B−V color index | +1.42[2] |
| R−I color index | 0.53 |
| Astrometry | |
| Radial velocity (Rv) | –19.7[4] km/s |
| Proper motion (μ) | RA: +0.71[1] mas/yr Dec.: –11.51[1] mas/yr |
| Parallax (π) | 6.98 ± 0.33[1] mas |
| Distance | 470 ± 20 ly (143 ± 7 pc) |
| Details | |
| Surface gravity (log g) | 1.75[5] cgs |
| Temperature | 4,080[5] K |
| Metallicity [Fe/H] | –0.03[5] dex |
| Rotational velocity (v sin i) | 10[6] km/s |
| Other designations | |
Sigma Aurigae (σ Aur, σ Aurigae) is the Bayer designation for a double star[8] in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.99.[2] With an annual parallax shift of 6.98 mas,[1] it is approximately 470 light-years (140 parsecs) distant from the Earth. This is an evolved giant star with a stellar classification of K4 III.[3] It has a magnitude 11.2 companion at an angular separation of 8.7 arcseconds.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
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