Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Nebula in Orion  ·  M 42  ·  M 43  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1982  ·  The star 42Ori  ·  The star 45Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri
M42 in monochrome, 



    
        

            Henry Kwok
M42 in monochrome
Powered byPixInsight

M42 in monochrome

M42 in monochrome, 



    
        

            Henry Kwok
M42 in monochrome
Powered byPixInsight

M42 in monochrome

Equipment

Imaging Telescopes Or Lenses
William Optics GT81 Apo
Imaging Cameras
Atik 314L+
Mounts
iOptron ZEQ25GT
Accessories
Orion Thin Off-Axis Guider (TOAG) · William Optics 0.8x Field Flattener Type VI
Software
GIMP 2.9 · DeepSky Stacker 3.3.4
Guiding Cameras
QHYCCD QHY5L II Autoguider

Acquisition details

Basic astrometry details

Astrometry.net job: 418097

RA center: 05h34m56s.9

DEC center: -05°2808

Pixel scale: 3.433 arcsec/pixel

Orientation: -100.436 degrees

Field radius: 0.828 degrees

Resolution: 1391x1039

Locations: Home, Auckland, New Zealand

Description

I acquired this image as part of my test for my recently acquired WO GT81 and secondhand Atik 314L+, mounted on my ZEQ25. I took only three subs at 10 seconds, 5 minutes and 10 minutes with no filter while ironing out the mount. I did a quick HDR combine and performed very limited editing since I had the subs anyway to see what I could get. I do not have commercial software to do HDR combine, so I used manual methods with GIMP 2.9. Unfortunately, I cannot find any reference on how to do noise reduction in GIMP 2.9, and I can no longer get the file back into Pixinsight LE for noise reduction - so this is one noisy picture. If you have any tips on how to denoise in GIMP 2.9, please let me know. Overall I am quite happy with the setup. Still need to tweak reducer spacing and mount balance.

Comments

Sky plot

Sky plot

Histogram

M42 in monochrome, 



    
        

            Henry Kwok