Asteria — interactive night sky map
Marsic B (Kappa Herculis) is a star in the constellation Hercules with an apparent magnitude of 6.25. It lies about 416 light-years from Earth. It is within reach of binoculars or a small telescope.
It is best placed in the evening sky around May. It is visible from the whole northern hemisphere and from southern latitudes down to about 73°S.