M57 - getting there (wip)

[wimvb]

This target is a pain to process. The dynamic range is huge; it has probably more dynamic range than the Orion nebula.

I'm still not quite satisfied. Too aggressive deringing during deconvolution made the stars too soft, and they won't reduce properly. This means having to start from almost scratch to get it right.

Still, not too bad so far either.

Comments welcome.

Data from the Liverpool Telescope on La Palma.

This is a HaRGB combination with various exposure times for rgb. Ha at 120 sec/sub.

Pixelscale 0.28" per pixel; aperture 2 m

[gnomus]

Stunning Wim.  Are the stars a bit magenta?  (Probably not I'm viewing on one of those iPad thingamajigs.)

[Davey-T]

Coming along nicely Wim, got my humble 10" SCT capturing some HA of it as we speak, don't think I'll rival the LT data 

Dave

[wimvb]

5 hours ago, gnomus said:

Stunning Wim.  Are the stars a bit magenta?  (Probably not I'm viewing on one of those iPad thingamajigs.)

They may very well be. Will see how they come out in the next version

[peter shah]

great scale super shot

[Rodd]

Looks great--nice details starting to show in the ring walls.  Never get that with a smaller scope.  Have you tried reducing the brightness of the ring itself?  There is allot of light there.  Not sure, but the background looks a tad reddish to me--though that may be Ha that is supposed to be there.

Rodd

[ultranova]

On the plus side.... If you crack this one

The rest should be easy ?

Very nice attempt

Paul

[wimvb]

38 minutes ago, Rodd said:

Looks great--nice details starting to show in the ring walls.  Never get that with a smaller scope.  Have you tried reducing the brightness of the ring itself?  There is allot of light there.  Not sure, but the background looks a tad reddish to me--though that may be Ha that is supposed to be there.

Rodd

The outer ring is mainly Ha, so it's supposed to be red. I could also put a tiny amount in the blue channel, to indicate Hb. With the outer ring as 'bright' as here, the main nebula would be completely blown out if not tamed in some way. Actually comparable to the Trapezium in the Orion Nebula.

[wimvb]

2 hours ago, ultranova said:

On the plus side.... If you crack this one

The rest should be easy ?

Very nice attempt

Paul

Not quite there yet, but better?

[simmo39]

One of my favourite targets. Brill to my eyes!

[kirkster501]

Brilliant picture. 

I'll give that a go in my backyard 2m scope I think.....