Omega Herculis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 25m 24.95425s |
| Declination | +14° 01′ 59.7711″ |
| Apparent magnitude (V) | 4.5821 (4.58 + 11.5) |
| Characteristics | |
| Spectral type | A2 Vp CrSr |
| U−B color index | +0.01 |
| B−V color index | +0.00 |
| Variable type | α2 CVn |
| Astrometry | |
| Radial velocity (Rv) | −5.90±0.74 km/s |
| Proper motion (μ) | RA: +40.86 mas/yr Dec.: −59.71 mas/yr |
| Parallax (π) | 13.04±0.64 mas |
| Distance | 250 ± 10 ly (77 ± 4 pc) |
| Absolute magnitude (MV) | 0.29±0.15 |
| Details | |
| ω Her A | |
| Mass | 2.14 M☉ |
| Radius | 3.30 R☉ |
| Luminosity | 70 L☉ |
| Surface gravity (log g) | 3.51±0.35 cgs |
| Temperature | 10,052±320 K |
| Metallicity [Fe/H] | +0.47±0.15 dex |
| Rotation | 2.951 d |
| Rotational velocity (v sin i) | 55 km/s |
| Age | 149 Myr |
| Other designations | |
| Cujam, ω Her, 24 Her, 51 Ser, BD+14°3049, FK5 613, HD 148112, HIP 80463, HR 6117, SAO 102153, WDS J16254+1402AB | |
| Database references | |
| SIMBAD | data |
Omega Herculis (ω Herculis, abbreviated Omega Her, ω Her) is a binary star system in the northern constellation of Hercules. Based upon an annual parallax shift of 13.04 mas as seen from Earth, it is located around 250 light-years from the Sun. It is faintly visible to the naked eye, having a combined apparent visual magnitude of 4.58. The system is a candidate for membership in the Ursa Major Moving Group, although this remains uncertain.
The two components are designated Omega Herculis A (officially named Cujam /ˈkjuːdʒəm/, the traditional name of the system) and B.