Psi7 Aurigae
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- For other star systems with this Bayer designation, see Psi Aurigae.
 The location of ψ7 Aurigae (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 50m 45.94330s[1] |
| Declination | +41° 46′ 52.4267″[1] |
| Apparent magnitude (V) | 5.02[2] |
| Characteristics | |
| Spectral type | K3 III[3] |
| U−B color index | +1.35[2] |
| B−V color index | +1.27[2] |
| R−I color index | 0.46 |
| Astrometry | |
| Radial velocity (Rv) | +59.53 ± 0.25[4] km/s |
| Proper motion (μ) | RA: –25.45[1] mas/yr Dec.: –138.19[1] mas/yr |
| Parallax (π) | 8.61 ± 0.22[1] mas |
| Distance | 379 ± 10 ly (116 ± 3 pc) |
| Details | |
| Radius | 24[5] R☉ |
| Surface gravity (log g) | 2.35[6] cgs |
| Temperature | 4,300[6] K |
| Metallicity [Fe/H] | 0.00[6] dex |
| Rotational velocity (v sin i) | 10[7] km/s |
| Other designations | |
Psi7 Aurigae (ψ7 Aur, ψ7 Aurigae) is the Bayer designation for a single[9] star in the northern constellation of Auriga. It is a dim, naked eye star with an apparent visual magnitude of 5.02.[2] Based upon parallax measurements made during the Hipparcos mission,[1] it is approximately 379 light-years (116 parsecs) distant from Earth.
This is an evolved giant star with a stellar classification of K3 III.[3] The measured angular diameter of this star, after correction for limb darkening, is 1.96 ± 0.04 mas.[10] At it estimated distance,[1] this yields a physical size of about 24 times the radius of the Sun.[5] The outer envelope shines with an effective temperature of 4,300,[6] giving it the orange-hued glow of a K-type star.[11]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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:
- ↑ 6.0 6.1 6.2 6.3 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
