About image 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.
Technical data Optic Tecnosky Apo Refractor 115 - 800mm f/6.9 Mount Losmandy G11 with Ovision worm and FS2 Camera Canon Eos 400D Baader modded Filters - Guiding system Skywatcher ED80 with Lodestar Exposure details 13x480" ISO 800 Total integration 2.5h Acquisition DSLR Shutter, PHD2 Processing Iris, Photoshop CS5 SQM-L 21.30 Location Pian dell'Armà (Pavia, Italy) Date 17 August 2012