Cygnus is amazing source of interesting objects, so decided to spend a third summer in row on projects in this constellation. Looking on widefield images selected few regions and digging into the catalogs narrowed the starting point for this image to be the NGC 6914. The Ha version of the image explains why decided to name it Yin-Yang
In fact identifying the objects in the image is a real hunt
The left blue nebula near the center is NGC 6914, the one in right is vdB132, more right and bit up is vdB131. All these blue nebulae are surrounded from the LDNs 899 (left part) 897 (right till the frame border). The part of the emission nebula bellow the LDNs to right are LBN 218 and 273. The emission in the left and upper part of the frame should be LBN 292, but is possible some parts of it to be cataloged as separate numbers... Let add one more catalog in the mix
The small comma like sign under vdB131 is the bipolar planetary nebula Parsamian 22.
The whole region is 6000 l.y. away and is considered that the emission red part is lit by the ultraviolet light of very hot stars part of the Cygnus OB2 association. These stars are ionizing the atomic hydrogen gas.
https://www.astrophotography.app/
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