Explore NGC6888 The Crescent Nebula



NGC6888 also known as The Crescent Nebula, is a very faint emission nebula in the constellation Cygnus. This nebula is about 5000 light-years away. I like calling this The Horseshoe Crab Nebula. It is formed from very fast stellar wind from two stars colliding about 250,000 to 400,000 years ago resulting in a shell and two shock waves.

This is also known as the “Euro sign nebula” due to its shape.

I acquired this image over two consecutive nights. Night one I took about 40 frames at 240 seconds, out of which I was only able to use 21 due to clouds. The second night I took 30 frames at 300 seconds. I had to throw one out due to airplane trails. This was taken through an Optolong L-Pro filter.

Processing Info

I stacked the 50 light frames along with 40 dark and flat frames. I had registerwd and each night's pictures the previous morning and then stacked them all together at the end of the second night

The following processes were performed in PixInsight:

Once I found what I liked, I saved the files and went to Photoshop and ran Topaz AI DeNoise. This is an amazing plugin that works like magic.

If anyone is curious here are the full res versions of the images.

The area of the sky in Cygnus
Here you can see the area of the sky in Cygnus imaged.

Acquisition Data