M46 (NGC 2437) is an open cluster in the constellation Puppis. At magnitude 6.0 it is barely visible to the naked eye in dark skies.

M46 has a little planetary nebula within the boundaries of the cluster. You can see it in the upper left center of the picture. It may or may not be part of the cluster.

M46

The picture was taken with a fully modified Canon Rebel camera (this is my one shot color (OSC)) on a TEC 140 telescope from the Alpenglow-Torrey House Observatory in the dark sky community of Torrey, Utah (Bortle 2-3). 12 two-minute sub frames stacked in Deep Sky Stacker = 24 minute photo. Processed in Photoshop (CS5). Unguided, no calibration frames.

Location of M46:

Source: Astrometry.net