Sorna Prime in Sylvia Tilly's personnel file
Sorna Prime was the prime planet of its star system. This system was located in the Beta Quadrant.
In the mirror universe, the personnel file of Captain Sylvia Tilly listed this planet with other locations in her distinguished service career. One of her nicknames was "The Slayer of Sorna Prime". (DIS: "Despite Yourself")
In 2259, the location of this planet was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This planet's symbol was a red Klingon Empire logo, indicating its affiliation with the empire. (SNW: "Strange New Worlds", "Children of the Comet", "Spock Amok")
In 2399, the planet's location was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This planet was in or near to Klingon space. (PIC: "Maps and Legends")