IC 5146, The Cocoon Nebula (Sharpless 2-125, Caldwell 19) in Cygnus, is a star-forming nebula that lies about 4000 light-years from Earth. The central star formed about 100,000 years ago. The emission nebula is surrounded by the dark nebula, Barnard 168.  which is also designated Lynds Dark Nebula (LDN) 1055.

Exposures: Ha:L:R:G:B = 510:145:95:95:80 minutes + 15 hours, 25 minutes total exposure at f/6/8, all unguided.