Memory Alpha
Memory Alpha
Multiple realities
(covers information from several alternate timelines)

"This isn't Starbase 46. Where the hell are we?"
– Gabriel Lorca, feigning surprise at where the USS Discovery ended up, 2256 ("Despite Yourself")

Porathia was a binary star system in the Alpha Quadrant. The ocean planet Porathia was located in this system.

During the Klingon War, Porathia was included on force movement star charts during the Battle of J'Gal. (SNW: "Under the Cloak of War")

In the 2250s, the ISS Discovery engaged rebels in the asteroid field of this system. During this mission, this Discovery and the prime USS Discovery swapped places. The latter ship later rendezvoused with the ISS Shenzhou in this field, during which Michael Burnham, Ash Tyler, and Gabriel Lorca were transported over to the Shenzhou. (DIS: "Despite Yourself")

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the United Federation of Planets. (SNW: "Strange New Worlds", "Spock Amok")

The system's location was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters in 2399 and on the bridge of the USS Titan-A in 2401. The Porathia system was in or near to neutral space. (PIC: "Maps and Legends", "The Next Generation", "Disengage")

In 3189, the location of Porathia was denoted on a holographic star chart of the galaxy at Federation Headquarters. (DIS: "Scavengers")

In 3190, this system was located outside Federation territory. (DIS: "All In")

It was implied that this system was in the same galactic position as Starbase 46 in the prime universe, which was located near Organia.

According to the revised edition of the Stellar Cartography: The Starfleet Reference Library ("History of the United Federation of Planets"), Porathia was a star system in the prime universe, located near Starbase 46.