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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M42 in H-alpha

Technical card

Imaging telescope or lens: Samyang 135mm f/2 ED UMC

Imaging camera: ZWO ASI174MM

Mount: Sky-Watcher HEQ5 PRO

Guiding telescope or lens: Skywatcher ST80

Guiding camera: ZWO ASI034MC

Software: Deep Sky StackerGIMP 2.9PHD2 Guiding

Filter: Baader Ha 7nm 2"

Resolution: 1920x1200

Dates: Jan. 19, 2017

Frames: Baader Ha 7nm 2": 30x300" (gain: 180.00)

Integration: 2.5 hours

Darks: ~12

Avg. Moon age: 21.76 days

Avg. Moon phase: 54.14%

Bortle Dark-Sky Scale: 4.00

Astrometry.net job: 1415826

RA center: 83.651 degrees

DEC center: -5.650 degrees

Pixel scale: 9.485 arcsec/pixel

Orientation: 79.038 degrees

Field radius: 2.983 degrees

Locations: Home, Stanford in the Vale, Oxfordshire, United Kingdom

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Author

Jonathan Edgecombe
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M42 in H-alpha, Jonathan Edgecombe

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