From Halopedia, the Halo wiki
Luyten is a human Inner Colony world of the Unified Earth Government, located in the Luyten 726-8 system. Relatively close to the Sol system, Luyten is approximately a six-day travel from Earth via slipstream space. Luyten is comparatively smaller than the colonies in the Sol and Epsilon Eridani systems, though a strong, densely populated core world nonetheless.
List of appearances