SH2-274 Medusa Nebula (HOO blend in RGB) (Yungshih Lee)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: PGC 1420816 · PGC 1421175 · PGC 1422135 · PGC 1422206 · PGC 1425279 · PGC 1426182 · PK205+14.1 · Sh2-274

SH2-274 Medusa Nebula (HOO blend in RGB)

I shot the nebula in Ha, OIII, and RGB and originally processed it in HOO+RGB stars. But I thought the RGB palette was more pleasing visually. The HOO image feels like a duo-tone screen printing and lacks the mid-tone. The RGB image with continuum colors has a translucent feeling that the narrowband image cannot show. So I tried something different here. I used the continuum subtraction method Charles Hagen posted and blended OIII into the RGB image. I used OGG for a synthetic narrowband image but blended it into the B channel. (I tried G, but it does not look particularly nice.) I quite like the final result.

Edit: The OIII/RGB image did not utilize the 2.5 hours of Ha signal. So I use the newly available PixInsight script: Image Blend. IB adds layers into PI and I was able to get the best of both RGB and HOO without sacrificing any signals.

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Title: OIII RGB

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Status	Advanced success
Started	...
Astrometry.net job	9104777
PixInsight job	9LD65229CERM6BEQWSY424L194AZNCAX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h29m04s.850
RA (top/left)	07h27m44s.943
RA (top/right)	07h29m40s.310
RA (bottom/right)	07h30m23s.428
RA (bottom/left)	07h28m27s.901

Dec (center)	+13°14′41″.29
Dec (top/left)	+13°13′28″.43
Dec (top/right)	+12°57′29″.19
Dec (bottom/right)	+13°15′52″.10
Dec (bottom/left)	+13°31′52″.20

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SH2-274 Medusa Nebula (HOO blend in RGB)

SH2-274 Medusa Nebula (HOO blend in RGB)

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SH2-274 Medusa Nebula (HOO blend in RGB)

SH2-274 Medusa Nebula (HOO blend in RGB)

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