Omega Herculis
From Infogalactic: the planetary knowledge core
 Historical view of the Hercules constellation showing the star Kajam (ω Her) as "the club" in the hero's right hand. |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 25m 24.9533s[1] |
| Declination | 14° 01′ 59.770″[1] |
| Apparent magnitude (V) | 4.5821[2] |
| Characteristics | |
| Spectral type | B9p Cr[2] |
| U−B color index | 0.01[3] |
| B−V color index | +0.00[3] |
| Astrometry | |
| Radial velocity (Rv) | -5.9[1] km/s |
| Proper motion (μ) | RA: 39.39[1] mas/yr Dec.: -59.89[1] mas/yr |
| Parallax (π) | 13.87 ± 0.94[4] mas |
| Distance | 240 ± 20 ly (72 ± 5 pc) |
| Absolute magnitude (MV) | 0.29 |
| Other designations | |
| Database references | |
| SIMBAD | data |
Coordinates: 
16h 25m 24.953s, +14° 01′ 59.77″
Omega Herculis (ω Her, ω Herculis) is a star in the constellation Hercules. It has the traditional name Kajam ("club") (also written as Cajam, Cujam).[5]
In Chinese, 斗 (Dǒu), meaning Dipper for Liquid, refers to an asterism consisting of ω Herculis, 49 Serpentis, 13 Herculis, 29 Herculis and 33 Herculis.[6] Consequently, ω Herculis itself is known as 斗一 (Dǒu yī, English: the First Star of Dipper for Liquid.)[7]
Omega Herculis was a latter designation of 51 Serpentis.[8]
Structure
Omega Herculis belongs to spectral class B9pCr and has apparent magnitude +4.58. It is approximately 240 light years from Earth.
See also
- Lists of stars in the constellation Hercules
- Class B Stars
- Variable star
- Double star
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ↑ (Chinese) 香港太空館 - 研究資源 - 亮星中英對照表, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
