NGC 2439 is a sparse[5] open cluster of stars in the constellation Puppis.

It has an apparent visual magnitude of 6.9, an angular size of 10 arcminutes, and is visible using a small telescope.

[4] This is a young cluster with age estimates in the range of 20–300 million years.

[2] A value in the range 3–4 kpc means the cluster lies well below the Galactic Plane.

It is positioned in a hole in the Milky Way's gas and dust, with the reduced absorption resulting in a lower than expected extinction of 1.27 in visual magnitude.