“IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula.”
Wikipedia

Object ID Cocoon Nebula
IC 5146 / C19
Details Cygnus
Mag. 7.2, 12′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 9 or 10 x 180s each RGB 1×1
Capture APT
Processing Nebulosity, Photoshop