Hi all,
I was able to take advantage of a run of cooler and drier nights and continued with my experiment with the Trifid.
I tried something new, at least to me, and aimed at putting together a pure narrowband SII-HA-NII Trifid. As expected, NII and HA turned out to be quite similar, if not identical, while SII is relatively weak, so getting any colour in the image was like squeezing water out of a rock.
Luminance is a composition of Ha+SII+NII. Total 40 hours of exposure.
Astrobin image in
here, and, if you are truly brave, please check the high resolution version
here.
If we get a good night or two in the near future, I may try a more traditional HA+SII+NII_RGB hybrid, or may chuck OIII into the mix as well
Thank you for looking
Suavi
EDIT: Version 2:
https://www.astrobin.com/full/416173/B/?nc=user