Zeta Herculis [SEP] constellation
Zeta Herculis
Zeta Herculis (ζ Her, ζ Herculis) is a multiple star system in the constellation Hercules. It has a combined apparent visual magnitude of 2.81, which is readily visible to the naked eye. Parallax measurements put it at a distance of about from Earth.
The primary member is a subgiant star that is somewhat larger than the Sun and has just begun to evolve away from the main sequence as the supply of hydrogen at its core becomes exhausted. It is orbited by a smaller companion star at a
HD 158614
HD 158614 is a spectroscopic binary star system approximately 60 light-years away in the constellation of Ophiuchus.
This system is in the Zeta Herculis moving group, which is of low metallicity stars, 5 billion years old. Besides ζ Herculis, the group includes δ Trianguli, ζ Reticuli, 1 Hydrae, Gl 456, φ Pavonis, and GJ 9079.
This binary was included in a search for brown dwarfs that turned up no large companions.
See also.
- Zeta Herculis