IC 5146 is a reflection/emission nebula in the constellation Cygnus.
IC 5146 refers specifically to the star cluster and Sh2-125 to the nebula.
It shines at magnitude +10.0
The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago.
The nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.
When viewing IC 5146, dark nebula Barnard 168 (B168) is forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.(WIKI)

Imaged with 10" F/2.8 POWERNEWT Astrograph.
40 min for LUM 10 mins for each RGB channel (Total of 70 minutes)
SBIG ST8300M with FW5 filterwheel and BAADER LRGB filters.
EQ6 PRO mount with PHD guiding

Imaged from the NEGEV desert in ISRAEL