NGC 6914
NGC 6914 is a reflection nebula in the constellation Cygnus. It is surrounded by dark nebulae and a giant nebula that is primarily visible in the H-alpha wavelength. It is located about 6'000 light years away. Ultraviolet radiation from stars in the Cygnus OB2 association provide the ionization of the nebula. This association includes one of the largest known stars, NML Cygni. Estimates of the size of this star go up to 2'770 times the radius of our sun.

Sadr Region / Butterfly nebula
The Butterfly Nebula is located in the constellation Cygnus and is mainly an emission nebula. However, there is also a smaller dark nebula (LDN 889) directly in the centre of this red nebula. The emission nebula has the catalogue designation IC1318 and is sometimes called the Gamma Cygni Nebula. Gamma Cygni is the bright star directly above the Butterfly Nebula. Gamma Cygni or Sadr is a special F8 type star. It is special because unlike most other supergiant stars it is neither cold and red nor blue and hot. It is much more yellow and about as hot as our sun. Sadr is about 1,800 light years away from our solar system. The nebula itself is estimated to be between 2,000 and 5,000 light years from Earth.

Source:
NGC 6914
Cygnus OB2
NML Cygni
stars.astro
NASA

Image on Astrobin: https://www.astrobin.com/cs4alr/
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