Pacman Nebula (SHO) (Linda)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · LBN 615 · LBN 616 · NGC 281 · Sh2-184

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Pacman Nebula (SHO)

Link: https://lindasastronomyadventures.space/?p=10779

Powered byPixInsight

Pacman Nebula (SHO)

Link: https://lindasastronomyadventures.space/?p=10779

This is my second attempt at Pacman, this time as a narrowband image. I really liked the broadband version though I may go back and reprocess it) but wanted to see what narrowband would show and it's hard not to love the narrowband version.

There is a lot of data here though the OIII is not quite as good as it could have been thanks to some clouds but overall the data was workable without any major trouble thanks to having a lot of data. This is presented in a tone mapped SHO version, a combination I'm finding I really like. Here's what I did:

each S, H and O:
dynamic crop
deconvolution
histogram transformation
tgv denoise
starXterminator (extracting stars)

SHO:
channel combination (SHO)
LHE (2 scales)
dark structure enhance script
MLT sharpening
curves (contrast)
Then a bunch of fiddling to tame a nasty looking diffraction spike/halo on one star using a combination of MLT to remove some layers and Curves to shift some hues and color saturation (all using a mask generated in GAME). Ultimately that helped but I took the image into PS and used context aware fill to get rid of the vestiges. While I was in PS I did a touch of noise reduction in Camera Raw.
pixel math in Ha stars

Ha stars
histogram transformation

Ultimately I decided to just use Ha stars. It looked better than the SHO stars. Except for that one diffraction spike/halo star it was relatively straightforward. I was almost able to tame it in PI. I suppose I could have used Clone Stamp to accomplish it but context aware fill did the job faster and probably better than I could have on my own.

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Status	Advanced success
Started	...
Astrometry.net job	5275701
PixInsight job	9T2IR9G2K8UKGE9883GTPWJ2VW1XKX73
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h52m16s.859
RA (top/left)	00h55m01s.308
RA (top/right)	00h49m21s.538
RA (bottom/right)	00h49m35s.761
RA (bottom/left)	00h55m09s.120

Dec (center)	+56°37′08″.50
Dec (top/left)	+56°59′11″.78
Dec (top/right)	+56°57′31″.97
Dec (bottom/right)	+56°14′53″.45
Dec (bottom/left)	+56°16′30″.84

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Pacman Nebula (SHO)

Pacman Nebula (SHO)

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Pacman Nebula (SHO)

Pacman Nebula (SHO)

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