Kappa Herculis
Star in the constellation Hercules / From Wikipedia, the free encyclopedia
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Kappa Herculis (κ Herculis, abbreviated Kappa Her, κ Her) is an optical double star in the constellation of Hercules. The two components, Kappa Herculis A (Marsic /ˈmɑːrsɪk/, the traditional name of the system)[15] and B, were 27.3 arc seconds apart in 2000. Based on parallax measurements from the Hipparcos mission, κ Her A is about 113 parsecs (370 light-years) from the Sun and κ Her B is 600 parsecs (2,000 light-years); more recent parallax measurements suggest that B is around 5% more distant than A.
A faint third component Kappa Herculis C is just over 1 arc-minute away.[16] It is at the same distance as κ Her A and has an almost-identical space motion.[17]
The star 8 Herculis forms a naked eye pair with Kappa Herculis 14′ away.