Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  41 the01 Ori  ·  43 the02 Ori  ·  De Mairan's nebula  ·  Great Orion Nebula  ·  M 42  ·  M 43  ·  Mairan's Nebula  ·  NGC 1976  ·  NGC 1982  ·  Orion Nebula  ·  PGC 3081010  ·  Sh2-281  ·  The star θ1Ori  ·  The star θ2Ori
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M 42 Orion Nebula, Michael Timm
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M 42 Orion Nebula

Getting plate-solving status, please wait...
M 42 Orion Nebula, Michael Timm
Powered byPixInsight

M 42 Orion Nebula

Equipment

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Acquisition details

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Description

I was really surprised to see how detailed a single frame of M 42 is. I knew this is an easy to shoot target, but i didn't knew how easy it would be. On the other hand the postprocessing was hard. Postprocessing wants to destroy image information in the background while preserving and strengthening information in the foreground. But here we have no real background, most of the image contains the object. So i had to be really careful and limited postprocessing to an absolut minimum.

I am really happy with this one. If i look back at the first image of the orion nebula that i took back in november 2017 [https://www.astrobin.com/322849/], i am a bit proud of my progress. Back then i thought, i will never be able to shoot images as good as the ones i saw here on AstroBin. Well, of course a lot of your M 42 images are way better than this one, but this image is way beyond my own expectations i had back in 2017 when i started astroimaging and that is what counts.

Besides my philosophical thoughts, i processed the image in two [edit: three] different ways: Version A is stacked with the classical kappa sigma algorithm, while version B has seen the Entropy-Weighted-Average (HDR) one. I don't know how to perform a real HDR image (maybe i will take a look at this in the next weeks), but the differences are visible. All other postprocessing steps where similar. Version B shows way more color information (a bit too much i think) than version A, but the contrast is way better in some areas.

[Edit] I was curious and found out that doing a real HDR-image is easy with PixInsight (thanks once again to Kayron Mercieca and the great tutorials at LVA). So Version C is the one with HDR :-)

Comments

Revisions

  • M 42 Orion Nebula, Michael Timm
    Original
  • M 42 Orion Nebula, Michael Timm
    B
  • M 42 Orion Nebula, Michael Timm
    C
  • Final
    M 42 Orion Nebula, Michael Timm
    D

B

Description: Entropy-HDR stacked.

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C

Description: The real HDR-Version.

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D

Description: New postprocessing workflow

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Sky plot

Sky plot

Histogram

M 42 Orion Nebula, Michael Timm