Kriosian system
The Kriosian system, also known as the Krios system, was an inhabited planetary system in the Beta Quadrant. The system contained the inhabited planet Krios Prime. 

In 2256, this system's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the . It was located in the territory of the Klingon Empire. ()

A year later, its location was labeled on the star chart showing the trajectory of Lieutenant Spock's shuttle. ()

By the 2360s, this system was on the border of Federation space. ()

The   visited the system twice, in late 2367 and in 2368. () 

In 2399, the system's location in neutral space was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. () 

Star systems