Groombridge 34
From Halopedia, the Halo wiki
Groombridge 34 is a binary star system that consists of two red dwarf stars in a nearly circular orbit with a separation of about 147 astronomical units. Both stars in this pair exhibit variability due to random flares, and they have been given variable star designations. (The brighter member Groombridge 34 A is designated GX And, and the other member is designated GQ And).
Groombridge 34 was the decommission-site for Construction Platform 966A, and where Kurt-051 went MIA.