Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  41 the01 Ori  ·  42 c Ori  ·  43 the02 Ori  ·  44 iot Ori  ·  45 Ori  ·  De Mairan's nebula  ·  Great Nebula in Orion  ·  Hatysa  ·  M 42  ·  M 43  ·  NGC 1973  ·  NGC 1975  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1981  ·  NGC 1982  ·  Sh2-279  ·  Sh2-281  ·  The star 42Ori  ·  The star 45Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri  ·  VdB44
Orion Nebula and Running Man Nebula, 


            Dan Gallo
Powered byPixInsight
Orion Nebula and Running Man Nebula, 


            Dan Gallo
Powered byPixInsight

Acquisition details

Oct. 8, 2019
Astronomik CLS CCD 2": 80×20(26′ 40″) -15°C bin 1×1
Astronomik CLS CCD 2": 60×5(5′) -15°C bin 1×1
31′ 40″
Avg. Moon age:
9.94 days
Avg. Moon phase:
Bortle Dark-Sky Scale:

RA center: 05h34m47s.22

DEC center: -05°1631.2

Pixel scale: 1.545 arcsec/pixel

Orientation: -93.256 degrees

Field radius: 1.047 degrees

More info:Open 

Resolution: 4031x2745

File size: 3.6 MB

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.


Sky plot

Sky plot


Orion Nebula and Running Man Nebula, 


            Dan Gallo

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Celestron RASA