The Koolhas system is a Beta Quadrant Star system, located in the Risa sector of the Sirius sector block. (STO video game: Star Trek Online)
One of the features of the features of the system was an Asteroid belt, which contained traces of Decalithium, a component in the creation of Red matter.
In 2409, a Starfleet starship investigated the system, and fought Klingons for control of the asteroids. (STO video game: Star Trek Online)