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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h11m 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−V color 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-hued star in the northern constellationofPerseus. The star is faintly visible to the naked eye with an apparent visual magnitude of +4.6.[2] Based upon an annual parallax shift of 11.32 mas as seen from the Earth,[1] the star is about 288 light years from the Sun.
ω Persei has the traditional name Gorgonea Quarta /ɡɔːrɡəˈniːə ˈkwɔːrtə/, being the fourth member of the quartet called the Gorgonea in reference to the Gorgons from the legend of Perseus.[8]
This is an evolved K-type giant star with a stellar classification of K0 III.[2] It is a red clump star that is generating energy via helium fusion at its core.[3] At the estimated age of 1.65 billion years, Omega Persei has double[2] times the mass of the Sun and has expanded to about 19[5] times the Sun's radius. It is radiating 144.5 times the Sun's luminosity from its photosphere at an effective temperature of 4,586 K.[2]
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