Delta Vega (Vulcan system)

Delta Vega was a planet located in the Vulcan system.

In 2265, Starfleet's outpost on the planet became infested with two species of native animal life, trapping Keenser inside the base. Starfleet special agent Erin Esurance was dispatched to rescue him, a mission she successfully accomplished. (TOS Video game: Delta Vega: Meltdown on the Ice Planet)

Alternate timeline
In the alternate reality created by the Narada being pulled into 2233, by 2258, Delta Vega had an outpost that was run by Starfleet officers Keenser and Montgomery Scott. Also, the Romulan Nero exiled Ambassador Spock from him timeline to this world. The ambassador flashed back to important moments of this life while exiled before seeing this reality's Enterprise send down an escape pod.

The escape pod had James Kirk, himself thrown off the Enterprise by this new timeline's Spock. The elder Spock managed to save Kirk's life from one of the native lifeforms, and explained the situation. By making their way to the Starfleet outpost, they met Scotty and Keenser, and found a way to get back to the Enterprise. (Star Trek, Wired 17.05: "When Worlds Collide")