Orionis Zeta

Orionis Zeta was a star visible from Earth which formed Orion's Belt, part of the constellation of Orion, along with Orionis Epsilon and Orionis Delta. Once Ian Chesterton showed it to Vicki Pallister. (PROSE: Byzantium!)

Behind the scenes
In the real world it is better known as "Zeta Orionis" or "Alnitak".