NGC 3532 is a large open cluster in Carina, and it lies a few degrees west of the Keyhole Nebula. It is the brightest cluster in a rich region, and contains about 120 stars. NGC 3532 was first recorded by Nicolas Lacaille in 1752.
NGC 3532 is sometimes known as the "Wishing Well Cluster". It got this name because it resembles a group of silver coins shimmering at the bottom of a wishing well. The cluster has an estimated age of 200-350 million years. It lies about 3 degrees from the remarkable star Eta Carinae and its associated nebula.