NGC 2439 is an open cluster of stars in the constellationPuppis. It has an apparent magnitude of 6.9, an angular size of 10 arcminutes and is visible using a small telescope. This cluster is about 3.855 kpc from the Solar System and has an age of about 10 million years. Observationally, this cluster is along the line of sight of two groups of B-typesupergiant stars. The nearer group is located at a distance of 1.03 kpc, while the second group is at 3.2 kpc.