Crescent nebula, NGC6888

My third attempt at this nebula. I wasn't having any luck with the color camera, even using the HaOiii filter. However using a mono camera with individual Ha and Oiii filter, with the two color channels combined in post processing was much easier.

 

From theastroenthusiast: "NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. It combines a composite color image with narrow band data that isolates light from hydrogen and oxygen atoms in the wind-blown nebula. The oxygen atoms produce the blue-green hue that seems to enshroud the detailed folds and filaments. NGC 6888’s central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun’s mass every 10,000 years. The nebula’s complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase."

 

Askar 120APO: 840mm f/7

ZWO ASI533MM Cooled Mono Camera at -20C

Guided on ZWO AM5

24x300s with Oiii filter

10x300s with Ha filter

Processed with PixInsight, Ps

 

Done