Upsilon Aurigae
 The location of υ Aurigae (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 51m 02.43724s[1] |
| Declination | +37° 18′ 20.0565″[1] |
| Apparent magnitude (V) | 4.74[2] |
| Characteristics | |
| Spectral type | M0 III[3] |
| U−B color index | +1.93[2] |
| B−V color index | +1.62[2] |
| R−I color index | 1.07 |
| Astrometry | |
| Radial velocity (Rv) | +37.68[4] km/s |
| Proper motion (μ) | RA: +36.85[1] mas/yr Dec.: -45.52[1] mas/yr |
| Parallax (π) | 6.24 ± 0.65[1] mas |
| Distance | approx. 520 ly (approx. 160 pc) |
| Details | |
| Radius | 73[5] R☉ |
| Other designations | |
Upsilon Aurigae (υ Aur, υ Aurigae) is the Bayer designation for a star in the northern constellation of Auriga. It has an apparent visual magnitude of 4.74,[2] which means it is bright enough to be seen with the naked eye. Based upon parallax measurements made during the Hipparcos mission, this star is approximately 520 light-years (160 parsecs) distant from the Earth.
This is an evolved red giant star with a stellar classification of M0 III.[3] It is a suspected variable star[7] and is currently on the asymptotic giant branch, which means it is generating energy at its core through the fusion of helium.[8] The measured angular diameter of this star, after correction for limb darkening, is 4.24 ± 0.05 mas.[9] At the estimated distance of Upsilon Aurigae,[1] this yields a physical size of about 73 times the radius of the Sun.[5]
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 Lua error in package.lua at line 80: module 'strict' not found.. The radius (R*) is given by:
- ↑ 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
