M57. The Ring Nebula

[Rodd]

This image has taken me months to complete. Seeing was consistently poor, and the best nights were filled with intermittent clouds.  It is a strange target.  20 sec subs at F10 yield a totally blown target.  For once I am not compelled to collect more data, unless it is to replace the marginal data I have.  Maybe 5 sec subs would suffice.  The ring is visible in 1 sec subs.  I tried making a synthetic luminance from the best subs, but did not see any benefit.  I am pleased the outer shells were picked up a bit, and the nearby spiral structure of galaxy NGC 1296 is discernible.  

C11Edge and asi 1600 bin 2x2

red 240 20 sec

green 367 20 sec

blue 384 20 sec

Edited June 21, 2021 by Rodd

[Rodd]

I reprocessed using a synthetic luminance.  I was careful to not remove too much green and not to lose the outer rings and nearby galaxy completely.