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IC 5146 is an open cluster linked to a diffuse nebula visible in the constellation of the Swan.
It is located 3.5 degrees east of M39, in the northern part of the constellation.
It is a small cluster surrounded by a very collected nebula (in the form of a cocoon, just called Cocoon Nebula), connected in turn to a system of obscure nebulosity, known by the initials B 168, which extends for about 2 degrees in the direction of M39.
This complex of obscure nebulosities is also very evident with binoculars because it obscures a rich stellar field. This set of nebulae would have a distance from the Sun of about 3300 light years.