Friday, September 25, 2015
M20 - The Trifid Nebula
I wanted to image this nebula for quite a while. But because of it's low declination (it's in Sagittarius) I have to do it from sites with a good view to the south. I started to image it at GSSP (red and blue) and then finished it at my trip to Richards ranch (luminance and green).
Discovered by Charles Messier on June 5th, 1764, we don't know exactly the distance to the Trifid Nebula - between 2200 and 7600 light-years.
It was weird when I first combined and auto-stretched this image I got some weird red artifacts around the stars:
Processing the RGB and Luminance image separately (and blurring the RGB images before applying the Luminance image) fixed this.