Phi Aurigae
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | 05h 27m 38.884s[2] |
| Declination | +34° 28′ 33.17″[2] |
| Apparent magnitude (V) | 5.089[3] |
| Characteristics | |
| Spectral type | K3 IIIp[4] |
| U−B color index | +1.649[3] |
| B−V color index | +1.411[3] |
| R−I color index | 0.47[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | +30.78±0.21[5] km/s |
| Proper motion (μ) | RA: −1.050 mas/yr[2] Dec.: −38.934 mas/yr[2] |
| Parallax (π) | 6.4359±0.1095 mas[2] |
| Distance | 507 ± 9 ly (155 ± 3 pc) |
| Absolute magnitude (MV) | −0.62[1] |
| Details | |
| Radius | 33.97±1.05[6] R☉ |
| Luminosity | 307±15[6] L☉ |
| Surface gravity (log g) | 1.75[4] cgs |
| Temperature | 4,222[6] K |
| Metallicity [Fe/H] | −0.03[4] dex |
| Rotational velocity (v sin i) | 1.6[7] km/s |
| Other designations | |
| φ Aur, 24 Aurigae, BD+34 1048, HD 35620, HIP 25541, HR 1805, SAO 58051[8] | |
| Database references | |
| SIMBAD | data |
Phi Aurigae is a giant star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from φ Aurigae, and abbreviated Phi Aur or φ Aur. This star is faintly visible to the naked eye with an apparent visual magnitude of 5.089.[3] It lies 10′ from another faint naked-eye star HD 35520, between the three open clusters M36 and M38, and NGC 1893.
The distance to this star, as determined from parallax measurements, is approximately 507 light-years (155 parsecs) with a 9 light-year margin of error.[2] It is drifting further away from the Sun with a radial velocity of +31 km/s.[5]
This is an evolved giant star with a stellar classification of K3 IIIp.[4] Having exhausted the supply of hydrogen at its core, it has expanded to 34 times the radius of the Sun. It is radiating over 300[6] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,222 K,[6] giving it the cool orange-hued glow of a K-type star.
References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). XHIP record for this object at VizieR.
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Phi Aurigae's database entry at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
