The moon visited in Prometheus is designated LV-223. In Ridley Scott’s science-fiction film, the spacecraft Prometheus travels to this remote moon after archaeologists interpret ancient star maps as an invitation from the mysterious Engineers.
LV-223 is not presented as an ordinary natural satellite with a familiar name. The crew discovers a barren, mountainous landscape containing enormous artificial structures, Engineer technology, and chambers filled with mysterious urns. These discoveries connect the moon to the film’s questions about humanity’s origins and the danger of advanced biological weapons.
Viewers often confuse LV-223 with LV-426, the moon associated with the original Alien and later Aliens. They are separate locations within the wider Alien universe. Prometheus also uses the name Zeta Reticuli in its broader mythology and promotional discussions, but the destination identified in the film itself is LV-223. The designation is therefore the precise canonical answer to the question.