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Contains:  NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, IC 430, NGC 1999, NGC 1990, M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, The star θ1Ori, The star θ2Ori, The star 49Ori, The star υOri, The star 42Ori, The star σOri, The star ιOri, The star Alnitak (ζOri), The star Alnilam (εOri), Part of the constellation Orion (Ori)
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Widefield of M42 (Orion Nebula) to IC 434 (Horsehead Nebula), 


            Frank Breslawski
Widefield of M42 (Orion Nebula) to IC 434 (Horsehead Nebula)

Widefield of M42 (Orion Nebula) to IC 434 (Horsehead Nebula)

Technical card

Imaging telescope or lens:Samyang 135mm f/2.0 ED UMC

Imaging camera:ZWO ASI 294MC Pro

Mount:Star Adventurer

Guiding camera:ZWO ASI 120MM Mini with 8x50

Software:PixInsight 1.8

Filter:Baader UV/IR Cut

Accessory:ZWO ASIair

Resolution: 2420x4020

Dates:Feb. 25, 2019

Baader UV/IR Cut: 30x5" (gain: 120.00) -10C bin 1x1
Baader UV/IR Cut: 120x60" (gain: 120.00) -10C bin 1x1

Integration: 2.0 hours

Darks: ~50

Flats: ~30

Bias: ~200

Avg. Moon age: 21.17 days

Avg. Moon phase: 60.32%

Bortle Dark-Sky Scale: 4.00 job: 2557704

RA center: 84.112 degrees

DEC center: -5.233 degrees

Pixel scale: 7.378 arcsec/pixel

Orientation: 0.268 degrees

Field radius: 4.808 degrees

Locations: Home, Bergisches Land, Germany

Data source: Traveller


This was a first test of my newly built and improved equipment for mobile use. I have owned the Star Adventurer for a long time and have used it with my Canon 700Da before. But especially in the warm summer nights the image noise became overwhelming...

So I decided to go for a cooled CMOS with a large colour sensor, which is very easy to operate with an ASIAIR via mobile phone and at the same time made the SA guidable. The mount itself got an even more stable wooden tripod and the clamps for the declination block were replaced by higher quality ones.

A few days ago the time had come: Everything in the living room was set up ready, carried out with one hand, aligned to Polaris and the first test started. For only 2 hours exposure time I am really satisfied with the result. Great, how the dust between the bright H-Alpha areas shows up. I kept M42 extra bright to emphasize the huge dynamic differences in this region.

I am very satisfied with the first light and hope that this combination (easy to transport, easy to operate and quick to use) will give me a lot of fun in the future. :-)



Frank Breslawski
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


Widefield of M42 (Orion Nebula) to IC 434 (Horsehead Nebula), 


            Frank Breslawski