Procyon V

Procyon V was the fifth planet in the Procyon system.

In a possible future, the historic Battle of Procyon V was fought at this location in the 26th century, between the United Federation of Planets and the Sphere-Builders, wherein the forces of the Federation were successful in driving the Builders back into their transdimensional realm.

Apocrypha
In the game Star Trek Online, the Procyon system is directly adjacent to the Andorian system and Procyon V is said to be one of the first exoplanets visited by Andorian space explorers.

Procyon V Procyon V