Hemisphere:  Southern  ·  Contains:  Great Orion Nebula  ·  Lower Sword  ·  M 42  ·  M 43  ·  Mairan's Nebula  ·  NGC 1973  ·  NGC 1975  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1982  ·  Orion Nebula  ·  The star 42Ori  ·  The star 45Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri  ·  the Running Man Nebula
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M42 Extreme HDR (H-alpha), 


            Ignacio Diaz Bobillo
M42 Extreme HDR (H-alpha)
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M42 Extreme HDR (H-alpha)

Technical card

Basic astrometry details

Astrometry.net job: 4132096

RA center: 5h 35' 5"

DEC center: -5° 17' 2"

Pixel scale: 0.617 arcsec/pixel

Orientation: 85.587 degrees

Field radius: 0.928 degrees

Resolution: 8768x6366

Locations: Home backyard, General Pacheco, Buenos Aires, Argentina

Data source: Backyard


This image is a bit of an experiment, playing with the high dynamic range mode of a QHY600 camera. The goal was to try to show in an image all of the features of M42/43 and the Running Man, from the small stars around the Trapezium, to the faint wisps of gas and dust surrounding the area. For this I did two series of subexposures. One with the camera in high dynamic range mode (13.8 stops) and with exposures such that no stars were saturated in the trapezium (100 sec), and another with the camera in my usual deep space mode and taking 5 minutes exposures. They were both combined, such that the core is basically the first stack and the rest is a combination. The final result is a bit weird, and possibly too flat, but lots of details are visible.



Ignacio Diaz Bobillo
License: None (All rights reserved)

Sky plot

Sky plot


M42 Extreme HDR (H-alpha), 


            Ignacio Diaz Bobillo