  | |
| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 11m 17.38161s[1] |
| Declination | +39° 36′ 41.7014″[1] |
| Apparent magnitude (V) | +4.614[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K0 III[2] |
| B−Vcolor index | 1.122[2] |
| Astrometry | |
| Radial velocity (Rv) | 6.61[2] km/s |
| Proper motion (μ) | RA: −26.26[1]mas/yr Dec.: +5.40[1]mas/yr |
| Parallax (π) | 11.32±0.23 mas[1] |
| Distance | 288 ± 6 ly (88 ± 2 pc) |
| Absolute magnitude (MV) | −0.234[4] |
| Details | |
| Mass | 2.04[2] M☉ |
| Radius | 19[5] R☉ |
| Luminosity | 144.5[2] L☉ |
| Surface gravity (log g) | 2.5[5] cgs |
| Temperature | 4,586±18[2] K |
| Metallicity [Fe/H] | −0.10[4] dex |
| Rotational velocity (v sin i) | 3.3[5] km/s |
| Age | 1.65[2] Gyr |
| Other designations | |
| ω Per,28 Persei,BD+39° 724,FK5 2667,HD 19656,HIP 14817,HR 947,SAO 56224,WDS J03113+3937A[6] | |
| Database references | |
| SIMBAD | data |
Omega Persei (ω Persei) is a solitary,[7] orange-huedstar in the northernconstellation ofPerseus. The star is faintly visible to the naked eye with anapparent visual magnitude of +4.6.[2] Based upon an annualparallax shift of 11.32 mas as seen from the Earth,[1] the star is about 288 light years from theSun.
ω Persei has the traditional nameGorgonea Quarta/ɡɔːrɡəˈniːəˈkwɔːrtə/, being the fourth member of the quartet called the Gorgonea in reference to theGorgons from the legend ofPerseus.[8]
This is anevolvedK-typegiant star with astellar classification of K0 III.[2] It is ared clump star that is generating energy viahelium fusion at its core.[3] At the estimated age of 1.65 billion years, Omega Persei has double[2] times themass of the Sun and has expanded to about 19[5] times theSun's radius. It is radiating 144.5 times theSun's luminosity from itsphotosphere at aneffective temperature of 4,586 K.[2]
