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Contains:  31 Ori, 34 del Ori, 41 the01 Ori, 42 c Ori, 43 the02 Ori, 44 iot Ori, 45 Ori, 46 eps Ori, 48 sig Ori, 50 zet Ori, Alnilam, Alnitak, B33, De Mairan's nebula, Great Nebula in Orion, Hatysa, Horsehead nebula, IC 423, IC 432, IC 434, IC423, IC426, IC431, IC432, IC434, IC435, M 42, M 43, M43, Mintaka, NGC 1975, NGC 1976, NGC 1977, NGC 1980, NGC 1981, NGC 1982, NGC 1990, NGC 1999, NGC 2023, NGC 2024, NGC1924, NGC1973, NGC1975, NGC1977, NGC1980, NGC1981, NGC1999, NGC2023, NGC2024, Orion, Part of the constellation Orion (Ori), Sh2-276, Sh2-277, Sh2-279, Sh2-281, The star 31Ori, The star 42Ori, The star Alnilam (εOri), The star Alnitak (ζOri), The star Mintaka (δOri), The star θ1Ori, The star θ2Ori, The star ιOri, The star σOri, VV Ori, VdB42, VdB44, VdB48, VdB51, VdB54
Getting plate-solving status, please wait...
Orion's Belt and Sword, 


            Michael Feigenbaum
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Orion's Belt and Sword

Technical card

Imaging telescopes or lenses:Nikkor 180mm ED lens F2.8

Imaging cameras:Nikon D5300

Mounts:Celestron CGEM DX Hypertuned

Guiding telescopes or lenses:ZWO 30F4 Guidescope

Guiding cameras:ZWO ASI 120 MC

Software:Stark Labs Nebulocity 4Stark Labs PHD 2.6DSS

Dates:March 25, 2019March 30, 2019

124x120" ISO800
80x15" ISO800

Integration: 4.5 hours

Darks: ~50

Flats: ~50

Bias: ~50

Avg. Moon age: 21.90 days

Avg. Moon phase: 52.32%

Bortle Dark-Sky Scale: 4.00 job: 2615575

RA center: 5h 35' 35"

DEC center: -3° 29' 45"

Pixel scale: 2.230 arcsec/pixel

Orientation: -2.580 degrees

Field radius: 4.316 degrees

Resolution: 7626x11664

Data source: Backyard


Out in the middle of nowhere to try doing something remote and see how actually setting up and doing something would work...

First time trying this and of course, there were problems. I had intended to do a narrowband image of this area in Ha and Oiii but I could not reach focus with my filter wheel attached.

So I decided to not waste the clear sky and see what would happen in straight luminence.

I think there is a lot of bloat because of the blue channel but still, I think it's pretty cool.

I will try to figure out how to use my filter wheel with either this 135mm lens or my 180 for some wide-field fun.

Update... I completely re-shot this project over the past several days. The original was so poor that I had to do it over, lol...

What I learned among a lot of other things, is that the Nikkor 180mm ED lens is really well suited to astrophotography. I've been able to get tight stars, it's reasonably fast and I discovered that the vignetting disappears if stopped down from f2.8 to f4. Thanks to a Jerry Lodriguss article about the lens...

Even getting rid of the residual CA was fairly easy which will be apparent when I publish the color version of this project.

I will make good use of this lens going forward.



Michael Feigenbaum
License: None (All rights reserved)


  • Orion's Belt and Sword, 


            Michael Feigenbaum
  • Orion's Belt and Sword, 


            Michael Feigenbaum
  • Orion's Belt and Sword, 


            Michael Feigenbaum
  • Final
    Orion's Belt and Sword, 


            Michael Feigenbaum


Description: Sharpened it a tad and stretched it a little... I think it's right on the edge of getting crispy... this is a final unless I replace it with a proper narrowband image.


Description: I had to re-work this image... The original was just not very good... I think this is a little better. I am working on an HDR color version of this and then I can put Orion to bed for the season. Perhaps this area of the sky is a little overworked and maybe gets tiresome to see so many examples of of M42 and the Horse/Flame but it is a favorite of mine and I would like to get to the point to where I could begin to do it justice...


Description: I added 80 frames of 15s and re-processed this as an HDR image.... that's it for this one. What a great learning experience this project was.

Sky plot

Sky plot


Orion's Belt and Sword, 


            Michael Feigenbaum

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