Zeta Her

ZETA HER (Zeta Herculis). With the exception of the brightest stars, star names were handed out more by position than brightness, as attested to by Zeta Herculis.

01 6212 zeta HER 16 41 17.1 +31 36 10 G0IV 2.81 0.65 6220 eta HER 16 42 53.7 +38 55 20 G8IIIbCN-1 3.53 0.92 6695 theta HER 17 56 15.1 +37 15 2 K1IIaCN+2 3.86 1.35 6588 iota HER 17 39 27.8 +46 0 23 B3IV 3.80 -0.18 6008 kappa HER 16 8 4.

The pair is now thought to be part of the Zeta Herculis stellar moving (kinematic) group of high velocity stars as defined by Olin J. Eggen in 1958, which no longer includes Zeta Herculis itself (del Peloso et al, 2000).

[4124] zeta Herculis is another double star composed of a subgiant and a faint companion star. [4129] eta Herculis is a G-class giant that acts as a gateway to Messier 13, the Great Cluster.

They belong to the Zeta Herculis stellar moving group. Both stars share similar proper motions and distances confirming that they indeed form a wide binary star. The stars are approximately 9,000 AU apart.

The four stars of the central trapezoid within Hercules, epsilon Her, zeta Her, eta Her, and pi Her, form the called Keystone. The globular star cluster M13 is located on the western part of the Keystone.

Local Association (Pleiades moving group)
AB Doradus moving group
Alpha Persei moving cluster
Beta Pictoris moving group
Castor moving group
Hyades Stream
IC 2391 supercluster
Zeta Herculis moving group ...

See also: Star, Planet, Constellation, Light, Sky