Kessik IV is a world located close to or in the Taurus Reach. It was the site of a Federation colony, known as the Kessik Colony. At the time of it's founding it was the furthest Federation colony from Earth. In 2265 is was destroyed by the Shedai Wanderer. The wanderer had awakened from a long slumber to find the planets under it's protection to be colonized by unwanted species.
In the Mirror Universe the Kessik Colony on Kessik IV was destroyed by a Tholian attack after the Shedai Wanderer destroyed a Tholian outpost on the opposite side of the same planet. this event nearly lead to all out war between the Tholian Assembly and the Terran Empire.