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  ·  HD294179  ·  HD294213  ·  HD294214  ·  HD294215  ·  HD294216  ·  HD294217  ·  HD294218  ·  HD294220  ·  HD294221  ·  HD294222  ·  HD294259  ·  HD294261  ·  HD294262  ·  HD294263  ·  HD294286  ·  HD294289  ·  HD294290  ·  HD294291  ·  And 139 more.
M42, The Great Nebula in Orion, Ginungagap42
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M42, The Great Nebula in Orion

M42, The Great Nebula in Orion, Ginungagap42
Powered byPixInsight

M42, The Great Nebula in Orion

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Description

This is an HDR composite shot over several nights.

I found that M42 is bright. REALLY BRIGHT! So my original series of 180 second RGB and 60 second Lum were completely blowing out the center of the nebula. I did a bunch of decreasing timed shots as follows:
3s L + 10s RGB
6s L + 20s RGB
10s L + 30s RGB
13s L + 40s RGB
20s L + 60s RGB

I used AstroPixel Processor to create stacks for each channel/time. I then used the HDR composition tool in PixInsight to combine these into the individual LRGB final channels. These were combined using the standard PixInsight workflow to get the final image.

I have escaped from my office for a week, so it's time for watching tutorials from Adam Block and obsessive reprocessing of old imagery...

The latest version of M42 is using the LRGB data from before and the Ha channel data from before as well. I used HDR Multiscale transform on the RGB, Luminance, and Ha channel data to bring out the detail in the core of the nebula. I then created two separate LRGB images, one with the Luminance data and one with the Ha data for the luminance channel. I then combined these two images with PixelMath using the following:  

max(LRGB, HaRGB) * 0.75 + min(LRGB, HaRGB) * 0.25

Comments

Revisions

  • M42, The Great Nebula in Orion, Ginungagap42
    Original
  • M42, The Great Nebula in Orion, Ginungagap42
    C
  • M42, The Great Nebula in Orion, Ginungagap42
    D
  • Final
    M42, The Great Nebula in Orion, Ginungagap42
    E

E

Description: Tweaked the stars to make them brighter. I think I overdid deconvolution originally and made the stars too dim.

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M42, The Great Nebula in Orion, Ginungagap42