LDN 889 is a dark nebula in the heart of the famous Butterfly Nebula or Gamma Cygni Nebula in the constellation Cygnus. In fact, the two wings of the Butterfly IC1318 B and C are not two emission nebulae, but one divided by the massive dark nebula LDN 889.
This object can be photographed from the northern hemisphere in summer and autumn. These nebulae are about 4,900 light years away from our solar system.
Sources: Constellation-Guide / Sternwarte Bärenswil / Spektrum der Wissenschaft

This is a false colour image with the typical Hubble SHO palette. That means, this image was taken with a monochromatic camera and three different filters (Ha, OIII and SII). Then the three greyscale images created by this technique were assigned to the colours red, blue and green using software such as Photoshop.
Below is a video showing how I edited this image.

Image on Astrobin: https://www.astrobin.com/yq8rpy/
Image in Instagram: https://www.instagram.com/p/Ci8I2jKMKuU/?hl=de