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.

The designations of the components as Kappa Herculis A, B and C derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).

[21] Consequently, the Chinese name for Kappa Herculis itself is 天市右垣三 (Tiān Shì Yòu Yuán sān, English: the Third Star of Right Wall of Heavenly Market Enclosure), representing the state of Jin (晉) (or Tsin),[22][23] together with 36 Capricorni in Twelve States (asterism).

Kappa Herculis is a suspected variable star with a reported magnitude range of 4.70 to 5.02.