This emission nebula in constellation Cygnus is about 5000 light years away.

It is powered by an O-type star in its center. O-Type stars are young massive stars which emit intense UV radiation which excites the surrounding gas and makes it glow in the spectral colors of hydrogen, oxygen and sulfur, which is combined here to a false color image. The stars are from images acquired with red, green and blue filters and are therefore presented in their approximate natural colors.
On the left parts of Sh2-115 with an embedded star cluster are visible, another interesting object … for next summer season, maybe.

Borg 90FL
1.08 Flattener
ZWO OAG
ASI 2600MM Pro
ZWO EFW
Baader Ultra-Narrowband 3.5/4nm, RGB Broadband
H: 27x300s
OIII: 36x300s
SII: 36x300s
RGB: 40x30s each
Total Integration: 9h15m over 3 nights
Bortle 4-5

PixInsight