This is the final image with 15 frames of 15 minutes stacked. I am happy by now as M-1 is already too low in my latitude for a new trying. Next year I am going to start earlier to be possible to capture narrow band subs to mix with the LRGB image.
This is actually a Supernova remnant. It is 6500 light years distant from Earth, has apparent size 8' x 4' and magnitude 8.4. In the core of the nebula there is a rotating neutron star.
The filaments in the nebula are moving outward at over 1000Km/sec.