Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  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 Great Orion Nebula, 


            Greg Bock
M42 Great Orion Nebula
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M42 Great Orion Nebula

Technical card

Imaging telescopes or lenses: Orion Optics UK 150F4 Ultrascope

Imaging cameras: ZWO ASI294 MC Pro

Mounts: Skywatcher HEQ5 Pro GoTo + Rowan belt mod

Guiding cameras: ZWO 120MC-S

Focal reducers: Baader MPCC Mark III

Software: Adobe Photoshop CC 2019  ·  Aries Productions Astropixel Processor


Dates:Nov. 14, 2020

Frames: 100x120"

Integration: 3.3 hours

Avg. Moon age: 28.69 days

Avg. Moon phase: 0.80%

Basic astrometry details

Astrometry.net job: 4094143

RA center: 5h 35' 20"

DEC center: -5° 22' 51"

Pixel scale: 1.587 arcsec/pixel

Orientation: 97.803 degrees

Field radius: 1.103 degrees

Resolution: 4137x2815

Locations: Leyburn Observatory - Dark Sky, Leyburn, Queensland, Australia

Data source: Backyard


Blended combination of 200 minutes and 200 seconds to capture the faint stuff as well as the bright stuff....ie The Trapezium. Test shot only, F4 optics not quite collimated properly, focus slightly off too.


Sky plot

Sky plot


M42 Great Orion Nebula, 


            Greg Bock