The Helix Nebula (NGC 7293) is located in the constellation Aquarius is one of the closest planetary nebula to the Earth at a distance of around 655 light-years.
It has an apparent magnitude of 7.6 and is about 25 arcminutes in size. The Helix Nebula has sometimes been referred to as the Eye of God or the Eye of Sauron.
The remnant central stellar core of the planetary nebula is destined to become a white dwarf star and the glow of the central star is so energetic that it causes the previously expelled gases to brightly fluoresce.

From almost 40 hours of 300 second SHO data aquired between 2020 and 2022 I whittled it down in Subframe Selector to the best 7 hours and then threw the book at it in Pixinsight.
So unless I can get to a darker sky (mine is Bortle 4 ... not great) but at least narrow band gets around the worst of effect of neighbours lights and passing cars lighting up the trees next to my observatory. A special shout out to Graxpert for helping manage the gradients. Fast, easy to configure, and very, very efficient without all the fuss managing the problem in DBE.

My preferred image quality markers are the background galaxies in both inside and outside the object. Getting the green out is by far the biggest challenge for this object in Narrowband. Once the stars are extracted, inverting the stars image and applying green SCNR correction and reinverting works best IMHO, followed by pushing the saturation and slightly lower the intensity with Curves Transformation to gives a nice balance. For the starless image a lot of careful convolved masking in gentle increments. BlurXTerminator is only used for correction on the raw calibrated frames and then careful use of LHEQ and Non-Stellar sharpening on the Starless image before NoiseXterminator which is always the very last touch on the Starless image and that can really pull out some more detail. Then finally recombined in Pixelmath. Apart from ACDNR Ligtness masking to tame the background a tad, the job was done. While it is so well placed for me now I started another project with deeper 10 minutes NB exposures but that could take another couple of years.