- Omega Herculis
-
Kajam, ω Her 
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 J2000Constellation 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/yrParallax (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]
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
- ^ a b c d e "SIMBAD query result:V* ome Her -- Variable Star of alpha2 CVn type". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%402744284&Name=HR%20%206008&submit=submit. Retrieved 2010-09-26.
- ^ a b van Leeuwen, F (November 2007). "Hipparcos, the New Reduction". Astronomy and Astrophysics (Centre de Données astronomiques de Strasbourg) 474 (2): 653–664. Bibcode 2007A&A...474..653V. doi:10.1051/0004-6361:20078357. http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2079043. Retrieved 2010-09-26.
- ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)" (PDF). Catalogue of Eggen's UBV data.. Bibcode 1986EgUBV........0M.
- ^ Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E. et al (1997). "The HIPPARCOS Catalogue" (PDF). Astronomy and Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P.
- ^ Kurt Vonnegut. "Constellations: Hercules 'the Strongman'". The BBC (British Broadcasting Corporation). http://www.bbc.co.uk/dna/h2g2/A29778916. Retrieved 2010-11-14.
- ^ (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.
Stars of Hercules Bayer α (Rasalgethi) • β (Kornephoros) • γ • δ (Sarin) • ε (Cujam) • ζ (Rutilicus) • η • θ • ι • κ (Marfik) • λ (Maasym) • μ • ν • ξ • ο (Atia) • π • ρ • σ • τ • υ • φ • χ • ω (Kajam) • b • c • d • e • f • g • h • i • k • l • m • n • o • q • r • s • t • u • w • x • y • z • AFlamsteed 1 (χ) • 2 • 4 • 5 (r) • 6 (υ) • 7 (κ, Marfik) • 8 • 9 • 10 • 11 (φ) • 13 • 14 • 16 • 19 • 20 (γ) • 21 (o) • 22 (τ) • 24 (ω, Kajam) • 25 • 27 (β, Kornephoros) • 28 (n) • 29 (h) • 30 (g) • 31 • 32 • 33 • 34 • 35 (σ) • 36 • 37 (m) • 38 • 39 • 40 (ζ, Rutilicus) • 41 • 42 • 43 (i) • 44 (η) • 45 (l) • 46 • 47 (k) • 48 • 49 • 50 • 51 • 52 • 53 • 54 • 56 • 57 • 58 (ε, Cujam) • 59 (d) • 60 • 61 • 63 • 64 (α, Rasalgethi) • 65 (δ, Sarin) • 67 (π) • 68 (u) • 69 (e)• 70 • 72 (w) • 73 • 74 • 75 (ρ) • 76 (λ, Maasym) • 77 (x) • 78 • 79 • 82 (y) • 83 • 84 • 85 (ι) • 86 (μ) • 87 • 88 (z) • 89 • 90 (f) • 91 (θ) • 92 (ξ) • 93 • 94 (ν) • 95• 96 • 97 • 98 • 99 (b) • 100 • 101 • 102 • 103 (ο, Atia) • 104 (A) • 105 • 106 • 107 (t) • 108 • 109 • 110 • 111 • 112 • 113Nearby WISE 1738+2732 • WISE 1741+2553List Categories:- Hercules constellation
- Bayer objects
- B-type main sequence stars
- Stars with proper names
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