Hemisphere:  Southern  ·  Contains:  Great Nebula in Orion  ·  M 42  ·  M 43  ·  NGC 1973  ·  NGC 1975  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1981  ·  NGC 1982  ·  The star 42Ori  ·  The star 45Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri
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Orion Nebula and Running Man Nebula, 


            Dan Gallo
Orion Nebula and Running Man Nebula
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Technical card

Imaging telescopes or lenses: Celestron Rowe-Ackermann Schmidt Astrograph 11"

Imaging cameras: ZWO ASI294MC Pro

Mounts: Losmandy G11 Gemini 2

Software: Sequence Generator Pro  ·  Lightroom  ·  PixInsight

Dates:Oct. 8, 2019

Astronomik CLS CCD 2": 80x20" -15C bin 1x1
Astronomik CLS CCD 2": 60x5" -15C bin 1x1

Integration: 0.5 hours

Darks: ~100

Avg. Moon age: 9.94 days

Avg. Moon phase: 75.87%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details

Astrometry.net job: 3250322

RA center: 5h 34' 47"

DEC center: -5° 16' 30"

Pixel scale: 1.545 arcsec/pixel

Orientation: 93.271 degrees

Field radius: 1.047 degrees

Resolution: 4031x2745

Data source: Backyard


I found this one more difficult to process due to the very bright core within the Orion Nebula.

For this, I captured two sets of exposures and combined them as an HDR image using the HDRComposition process in PixInsight. This is only ~30 minutes of data, as I have a limited window of targets toward the south, due to trees being in the way. Will try and find a better place to setup the telescope next time, and hopefully capture more data. Might also try the L-Pro filter next time, to see how the colors come out.

To fix the overly bright core in this image I first tried using HDRMultiscaleTransform, but this kept washing out and destroying the color towards the center of the nebula, regardless of the settings I used.

So I instead used varying sizes of masks to gradually lower the highlights of the core in phases, with each mask getting smaller and smaller until I ended up with this result.



Dan Gallo
License: None (All rights reserved)

Sky plot

Sky plot


Orion Nebula and Running Man Nebula, 


            Dan Gallo

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Celestron RASA