M57 (LHaRGB) - Sept/Oct 2019 (Geof Lewis)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · Ring nebula · Ring nebula in Lyra

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M57 (LHaRGB) - Sept/Oct 2019

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M57 (LHaRGB) - Sept/Oct 2019

This is my first attempt at capturing the outer halo of the Ring Nebula (M57). I was unsure how to process and combine the data so pretty much it was trial and error with me making it up as I went.

My initial capture of Ha data was using too short (5 min) subs, so even though I had over 30 of them, I still struggled to show the halo and blending with the RGB data was not succesful. After taking advice I increased the exposures to 15 mins and shot 15 new Ha subs. The halo was more clearly defined, but the combined HaR overwhelmed the core of the nebula, so I processed the RGB separately and used layers to retain the blue core. Finally I layered the L.

Original
Final
C

C

Description: Reworked to better control the star sizes and preserve colour and structure in the nebula

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Status	Advanced success
Started	...
Astrometry.net job	3024729
PixInsight job	DX5R7TEZ9MPDGSP279IJ2KPQIGVTI6G0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h53m34s.283
RA (top/left)	18h52m37s.481
RA (top/right)	18h54m27s.683
RA (bottom/right)	18h54m31s.313
RA (bottom/left)	18h52m40s.702

Dec (center)	+33°01′43″.91
Dec (top/left)	+32°53′26″.98
Dec (top/right)	+32°52′30″.64
Dec (bottom/right)	+33°09′59″.99
Dec (bottom/left)	+33°10′55″.46

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M57 (LHaRGB) - Sept/Oct 2019

M57 (LHaRGB) - Sept/Oct 2019

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M57 (LHaRGB) - Sept/Oct 2019

M57 (LHaRGB) - Sept/Oct 2019

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