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IC 59 and IC 63


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HaRGB image of IC59 and IC63, or also known as the Ghost of Cassiopeia. This is a tricky object to process and I'm not 100% happy with the result, need to work more on the blue reflection.

 

Integration:

 

RGB 5 hours of each filter. 2 min exposures at gain 75.

Ha 10 hours at 5 min exposures. Gain 139.

 

Ghost.thumb.jpg.792de6bee2a8df0436e6232eec3c7a06.jpg

 

 

 

Edited by AstronomyUkraine
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39 minutes ago, TerryMcK said:

That big star off screen is always a problem with the Ghost. I believe that is a lot closer to us than the nebula and creates a large halo that is difficult to process out. 

I deliberately avoided putting that star in the frame. Can just make out a blue halo at the top of the image.

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Very nice and good to see some natural RGB in there but the blue is going to be tricky. When you first mentioned it I checked it out on Stellarium, it's bigger than I expected and I can see the framing will be very critical. Where does the halo originate do you think, would a longer dew shield help?

Edited by paul
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22 minutes ago, paul said:

Very nice and good to see some natural RGB in there but the blue is going to be tricky. When you first mentioned it I checked it out on Stellarium, it's bigger than I expected and I can see the framing will be very critical. Where does the halo originate do you think, would a longer dew shield help?

Thanks Paul. The halo is from gamma Cas, which is the brightest star in Cassiopeia. This causes the blue reflection in the nebula.

Edited by AstronomyUkraine
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22 minutes ago, Astrobdlbug said:

Your SHO-AIP re-process has brought out more contrast/detail in the nebula. The reflection glow in the nebula from gamma Cas is much more apparent in this rendition

I definitely prefer this version

Bryan

Thanks Bryan. The SHO-AIP script is a fantasic tool for mixing Ha with RGB, far better than the NBRGB script.

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On 10/5/2021 at 5:51 PM, AstronomyUkraine said:

Thanks Mark. It has 25 hours already, not sure if more data will improve it any. Maybe adding some OIII to the mix might improve the colour a little.

Yes, looks like a boost in the blue is needed.

 

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On 10/6/2021 at 12:45 PM, AstronomyUkraine said:

Had another go at processing IC59. I prefer this version to the original. I mixed the Ha with the red channel in SHO-AIP, to use as the red channel, which resulted in a better balanced image IMO.

 

IC59.thumb.jpg.d25b306b5d6a34a5c4df5fd36999c7d0.jpg

Wow, l really like this mix.

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Very nice Brian, I really like the colours and the enhanced contrast in that new version. I think it's authentic too as it highlights the Ha red and the blue reflection. Everyone knows that Navi is just there out of frame so I wouldn't worry too much about the blue halo. 

One thought though... do you need to add some RGB stars? I think the star colour is better in the first rendition.

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12 minutes ago, Padraic M said:

Very nice Brian, I really like the colours and the enhanced contrast in that new version. I think it's authentic too as it highlights the Ha red and the blue reflection. Everyone knows that Navi is just there out of frame so I wouldn't worry too much about the blue halo. 

One thought though... do you need to add some RGB stars? I think the star colour is better in the first rendition.

Thanks Padraic. The stars are not too good. I keep using Starnet to remove the stars while I play with curves, but it's not doing a great job. I'm seriously looking at the new PS plugin called StarXterminator, but converting the xisf file into tiff, then re-importing back into Pixinsight doesn't appeal to me.

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