About image IC 5146 is a reflection/emission nebula in the constellation Cygnus.
To be more precise, the NGC catalogue description refers to IC 5146 as an open cluster of 9.5 mag stars involved in a bright and dark nebula, from which the name "Cocoon" given to the nebula which surrounds the cluster.
Indeed this nebula is a stellar nursery where star-formation is ongoing, like observed with astronomical satellites.
On the upper side of the image is visible the blue nebula VdB 147 and several dark lanes due to the dust.
All the complex is around 2500/3000 light years far from the Earth.
Technical data Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8 Mount 10Micron GM2000 HPSII Camera Moravian G3-16200 with external filter wheel 7 positions Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB Guiding system OAG Moravian M68 with guide camera Moravian G1-0301 Exposure details L 23x600" bin2 -20C R 7x600" bin2 -20C G 7x600" bin2 -20C B 7x600" bin2 -20C Total integration 7.3h Acquisition Voyager, PHD2 Processing Pixinsight 1.8, Photoshop CS5 SQM-L 21.20 Location Promiod (Aosta Valley, Italy), own remote observatory Date 10/11 August 2021