AT: "nt" The Laurentian system is a star system in the Milky Way galaxy.
With the bulk of Starfleet otherwise engaged in the system in 2258, a number of other ships stationed at Earth, including the USS Enterprise, were mobilized to respond to a distress call from Vulcan, which was under attack by the Narada. After the destruction of Vulcan, acting captain Spock planned to regroup with the rest of the fleet in the Laurentian system to balance the terms of the next engagement with the Narada. (Star Trek)
The comic book Star Trek: Nero suggests the Laurentian system is the location of Rura Penthe, and the Federation responded to a Klingon distress call after Nero destroyed 47 Klingon warbirds.