Hi Guys
M17 Swan Nebula in Colour Mapped Narrowband
Taken on my RCOS 10" RC Scope at f9, SBIG STXL6303E Camera and PME mount at itelescopes Siding Spring Observatory.
Processed with CCDstack, Star Tools and Photoshop. 52 hrs Total exposure time.
Ha, SII,Ha,OIII. Mapped as LRGB in "modified Hubble"
The Swan Nebula (also known as the Omega Nebula) is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter
Ha 32hrs, 40min subs bin1. SII 18hrs 40min subs bin2, OIII 12hrs 40min subs bin2.
Big
here
Lots of SII in this one as it turns out, provided a lot of data
.
Quite a few stars were sacrificed for artistic effect because they are annoying
I pushed Ha pretty hard (as lum), it was a pleasure to be able to without being buried in noise, its fairly bright.