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Contains:  IC 430, NGC 1999, M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, NGC 1973, The star 49Ori, The star 45Ori, The star ιOri, The star θ2Ori, The star θ1Ori, The star 42Ori, The star υOri
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The magnificent dusty Great Nebula in Orion - 4 panel mosaic LHaRGB

Technical card

Resolution: 5897x4372

Dates:March 2, 2018

Astrodon 5nm Ha: 52x1200" bin 1x1
Astrodon E-Series Blue filter: 48x300" bin 1x1
Astrodon E-Series Green filter: 48x300" bin 1x1
Astrodon E-Series Red filter: 48x300" bin 1x1
Astrodon Luminance E-Series: 60x180" bin 1x1
Astrodon Luminance E-Series: 120x30" bin 1x1
Astrodon Luminance E-Series: 48x300" bin 1x1

Integration: 37.3 hours

Avg. Moon age: 15.29 days

Avg. Moon phase: 99.69% job: 1950862

RA center: 83.801 degrees

DEC center: -5.788 degrees

Pixel scale: 2.096 arcsec/pixel

Orientation: 91.031 degrees

Field radius: 2.136 degrees

Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory


This project has been another long-held ambition for me and has been a labour of love over the past few weeks for Steve and I on our shared rig in Spain. We alternate over three weeks the duties of controlling and operating the rig and the capture programme and have both shared the joy and frustration of the winter weather - yes even in Spain. I've been intrigued by NGC1999 and its 'keyhole' along with the faint blue reflection nebula that surround the main attractions or M42, 43 and the Running Man and am delighted to have stitched together this four panel mosaic to show their relative positions.

Processing has taken as long as the total integration, circa 40 hours, and I can foresee us adding to this data next year. There is a tiny amount of data to capture to help the mosaic in a couple of places and we hope to be able to do this when the weather clears and at the next New Moon.

Each panel has 13 x 1200s Ha; 12 x 300s + 15 x 180s + 30 x 30s Lum; 12 x 300s of RGB each. A total integration of 37.3 hrs. Tak 106, 10 Micron GM1000HPS, QSI683wsg-8, Astrodon filters, SGP for capture and PI for processing, e-Eye, Spain.

Data acquisition: Steve Milne & Barry Wilson.
Processing: Barry Wilson

Hope you enjoy.



Barry Wilson



Small Curves adjustments to bring a little more impact


Re-processed for better core detail and resolution.

Sky plot

Sky plot


The magnificent dusty Great Nebula in Orion - 4 panel mosaic LHaRGB, 


            Barry Wilson