North American Nebula - using dual Ha-OIII filter - simulated SHO (Simon)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 56 Cyg · 57 Cyg · B353 · B355 · HD198480 · HD198896 · HD198931 · HD199021 · HD199099 · HD199178 · HD199206 · HD199312 · HD199355 · HD199373 · HD199395 · HD199416 · HD199417 · HD199479 · HD199511 · HD199512 · HD199547 · HD199579 · HD199580 · HD199799 · HD199870 · HD199939 · HD199956 · HD200060 · HD200102 · HD200311 · And 27 more.

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North American Nebula - using dual Ha-OIII filter - simulated SHO

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North American Nebula - using dual Ha-OIII filter - simulated SHO

Whilst my monochrome has gone off to China for repair - can you believe it! - I decided to use my colour camera with a dual filter. This image is a simulated SHO, using 105 subs each at 2 minutes long. The integration time for this is 3.5 hours. It was a challenge to get as much of this object(s) in the FOV, but I managed to squeeze in a fair amount. I also have an ongoing issue with halos through the OIII emission line, whether I use fast filters [which are supposed to correct the problem], or not. It is a major headache and I am not sure this is going to get solved. As that is the case I am finding that there is a seeping through of the blue from the O3 on every star, which is why they all look blue - which is not how they really are. I am also having to dial the stars right back and use some convolution to hide the halo effect on the stars - not ideal either. Why can nothing ever be straightforward - really enjoying the new fast scope, but not this aspect of its requirements! This will be my last image for a while, so I hope you enjoy it. Cheers. Simon

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Status	Advanced success
Started	...
Astrometry.net job	8320264
PixInsight job	SR0U6OIS34PTWU4IAAYKIWJLT77RBMJU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h55m34s.15
RA (top/left)	20h56m43s.84
RA (top/right)	20h45m48s.34
RA (bottom/right)	20h54m28s.56
RA (bottom/left)	21h05m29s.37

Dec (center)	+43°53′40″.5
Dec (top/left)	+45°43′12″.3
Dec (top/right)	+43°23′17″.8
Dec (bottom/right)	+42°04′05″.10
Dec (bottom/left)	+44°20′52″.7

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North American Nebula - using dual Ha-OIII filter - simulated SHO

North American Nebula - using dual Ha-OIII filter - simulated SHO

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North American Nebula - using dual Ha-OIII filter - simulated SHO

North American Nebula - using dual Ha-OIII filter - simulated SHO

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