M42 - The Orion Nebula (Alex Ranous)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 41 the01 Ori · 42 Ori) · 42 c Ori · 43 Ori) · 43 the02 Ori · 44 Ori) · 44 iot Ori · 45 Ori · Great Orion Nebula · HD36528 · HD36539 · HD36540 · HD36606 · HD36629 · HD36655 · HD36671 · HD36782 · HD36842 · HD36843 · HD36865 · HD36883 · HD36917 · HD36918 · HD36936 · HD36958 · HD36959 · HD36960 · And 50 more.

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M42 - The Orion Nebula

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M42 - The Orion Nebula

Not that the world needs yet another Orion Nebula, but I felt I needed one to fill out my portfolio. I started a while back, but had issues blowing out the core. I had tried an HDR technique with 120 and 30 sec subs, but still was blowing out the core. This year I decided to finish the project. I did a bunch of 5 sec subs, which with the 30 and 120 second masters, I managed to get a decent master lum with HDRComposition. I also shot some Ha. I first tried blending it into the red channel, but I wasn't happy with the results, making all the dust pink. I ended up blending it into my lum.

My normal technique of removing the stars while linear and stretching my Lum and RGB starless with the stars separate didn't really work. I found both StarXTerminator and Starnet2 didn't do a good job removing the central stars, taking a lot of surrounding nebulosity with it. Trying to blend the stars back later made for some ugly central stars, so I ended up leaving the stars in during processing. I ran BlueXTerminator on my lum, but left my RGB alone.

When I blended in my Ha to my lum, I did remove the stars from both after they were stretched. I masked off the bright parts of my lum using RangeSelection when blending in the Ha, as I was only interested in the Ha's extended nebulosity. Adding back in the stars right after this worked ok.

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Status	Advanced success
Started	...
Astrometry.net job	7192198
PixInsight job	E6MLLALFEDNYSGQ78NX26380AUBVPR4L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h34m52s.25
RA (top/left)	05h31m50s.59
RA (top/right)	05h31m54s.75
RA (bottom/right)	05h37m54s.66
RA (bottom/left)	05h37m49s.26

Dec (center)	-05°15′03″.4
Dec (top/left)	-04°08′17″.6
Dec (top/right)	-06°22′26″.10
Dec (bottom/right)	-06°21′41″.6
Dec (bottom/left)	-04°07′31″.8

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M42 - The Orion Nebula

M42 - The Orion Nebula

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M42 - The Orion Nebula

M42 - The Orion Nebula

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