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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, M43, NGC 1973, NGC 1975, NGC 1976, NGC 1977, NGC 1980, NGC 1981, NGC 1982, NGC1973, NGC1975, NGC1977, NGC1980, NGC1981, Sh2-279, Sh2-281, The star 42Ori, The star 45Ori, The star θ1Ori, The star θ2Ori, The star ιOri
Getting plate-solving status, please wait...
M42 with Esprit 80, 


            Tristan Campbell
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Technical card

Imaging telescopes or lenses:Sky-Watcher Esprit 80 ED Triplet Apo

Imaging cameras:asi zwo 1600 pro

Guiding telescopes or lenses:9x50 Skywatcher finder-guider

Guiding cameras:zwo 224mc

Filters:ZWO 1.25" HalphaZWO LRGB, 1.25"

Dates:Dec. 1, 2019

ZWO 1.25" Halpha: 119x300" (gain: 139.00) -20C bin 1x1
ZWO LRGB, 1.25": 247x120" (gain: 0.01) -20C bin 1x1

Integration: 18.1 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 4.86 days

Avg. Moon phase: 24.46%

Bortle Dark-Sky Scale: 5.00 job: 3093830

RA center: 5h 36' 1"

DEC center: -5° 12' 9"

Pixel scale: 1.908 arcsec/pixel

Orientation: -25.024 degrees

Field radius: 1.463 degrees

Resolution: 4323x3431

Locations: Home, Harrogate, North Yorkshire, United Kingdom

Data source: Backyard


Acquiring the data for this image has been extremely hard work due to atrocious British weather recently. Made over a period of about 6 weeks, taking sometimes just an hour at a time during any available clear periods available.

I'll never forget the first time I saw M42 through my home made 8" reflector on a freezing January night when I was about 15. Far more detail here but still not quite the same experience.

Approx 18 hours from Bortle 5 skies. 10 hours Ha and 8 LRGB (mostly RGB)



Tristan Campbell
License: None (All rights reserved)

Sky plot

Sky plot


M42 with Esprit 80, 


            Tristan Campbell