Messier 42 "Demystified" (I removed some of the intervening mist) (Alex Woronow)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 41 the01 Ori · 43 Ori) · 43 the02 Ori · De Mairan's nebula · Great Orion Nebula · LBN 974 · LDN 1640 · M 42 · M 43 · Mairan's Nebula · NGC 1976 · NGC 1982 · Orion Nebula · PGC 3081010 · Sh2-281 · The star Mizan Batil II (θ2 Ori · The star Trapezium (θ1 Ori A · The star θ1 Ori C · The star θ1 Ori D

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Messier 42 "Demystified" (I removed some of the intervening mist)

Powered byPixInsight

Messier 42 "Demystified" (I removed some of the intervening mist)

Messier 42 "Demystified" (I removed some of the intervening mist)
A.K.A: Orion Nebula

OTA: CDK14
Camera: Moravian C5A-100M
Observatory: New Mexico
Date of Processing: Dec '23

Exposures:
R: 50 x 120 sec
G: 53 x 120
B: 51 x 120
L: 224 x 120
Total Exposure time: 12.6 hours
Image Width: 59 arc-minutes

Processing Tools:
1.   Commercial: PixInsight, Topaz, Photo Director 365,
2.   Pixinsight Addons: NoiseXTerminator, BlurXTerminator, StarXTerminator
3.   My Scripts: NB_Assistant, AC_Restar, Subframe Weighting Tool (Excel w/ J. Hunt), ColorTweaker, StarTweaker

Processing Description:
These data were free from Dark Matters Astro. They were supplied as .fits L, R, G, and B stacked, unstretched images. They appeared to have undergone flattening and perhaps denoising. They were full frame: 11664x8750 pixels, minus a bit of cropping. The stacks were of excellent quality.

My processing was done at full resolution and included deblurring, stretching, star removal (and replacement), and, most notably, for this product, the suppression of the blue haze between us and this nebula's red interior. That was done in Topaz with help and refinement in contrast and differential brightness in PhotoDirector and my ColorTweaker.

The model of providing stacked, linear subs may be the future for image providers as camera sensors grow in pixel abundance, along with the growing recognition that more subs with shorter integration times per sub means better data quality. Personally, I will miss doing my own calibration, culling of inferior images, aligning, normalizing, stacking, and all the other intermediate steps I have not mentioned.

Statistics:
Distance: 1340 ly
Apparent Magnitude: 4
Average Surface Magnitude: 21
Apparent Span: 65x60 arc-minutes
Pixel Span at Target: 1.9B ly

Alex Woronow

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Status	Advanced success
Started	...
Astrometry.net job	8961737
PixInsight job	ORN1UIDAMS4VGGWJUURDJ0K0ADC30984
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h34m46s.663
RA (top/left)	05h36m42s.800
RA (top/right)	05h32m49s.486
RA (bottom/right)	05h32m50s.372
RA (bottom/left)	05h36m43s.908

Dec (center)	-05°30′13″.93
Dec (top/left)	-05°08′15″.92
Dec (top/right)	-05°08′35″.20
Dec (bottom/right)	-05°52′11″.10
Dec (bottom/left)	-05°51′51″.89

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Messier 42 "Demystified" (I removed some of the intervening mist)

Messier 42 "Demystified" (I removed some of the intervening mist)

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Messier 42 "Demystified" (I removed some of the intervening mist)

Messier 42 "Demystified" (I removed some of the intervening mist)

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