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Contains:  M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, NGC 1973, The star 45Ori, The star ιOri, The star θ2Ori, The star θ1Ori, The star 42Ori
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Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan
Orion Nebula / Running Man Nebula (false color)

Orion Nebula / Running Man Nebula (false color)

Technical card

Resolution: 4590x3280

Dates:Jan. 3, 2018Jan. 10, 2018Jan. 14, 2018Jan. 18, 2018Jan. 19, 2018Jan. 20, 2018

Frames:
Blue: 31x10" (gain: 50.00)
Blue: 89x30" (gain: 50.00)
Green: 36x10" (gain: 50.00)
Green: 93x30" (gain: 50.00)
ZWO H-alpha 7nm: 95x30" (gain: 50.00)
ZWO H-alpha 7nm: 10x300" (gain: 50.00)
ZWO H-alpha 7nm: 2x60" (gain: 50.00)
ZWO OIII: 16x150" (gain: 50.00)
ZWO OIII: 63x60" (gain: 50.00)
ZWO OIII: 48x90" (gain: 50.00)
ZWO Red: 38x10" (gain: 50.00)
ZWO Red: 90x30" (gain: 50.00)
ZWO SII 7nm: 14x150" (gain: 50.00)
ZWO SII 7nm: 53x60" (gain: 50.00)
ZWO SII 7nm: 20x90" (gain: 50.00)

Integration: 9.1 hours

Avg. Moon age: 12.29 days

Avg. Moon phase: 25.86%

Bortle Dark-Sky Scale: 8.00

Astrometry.net job: 2120343

RA center: 83.873 degrees

DEC center: -5.256 degrees

Pixel scale: 2.084 arcsec/pixel

Orientation: 88.625 degrees

Field radius: 1.633 degrees

Data source: Backyard

Description

Boy am I out of practice when it comes to processing! I shot this data in January and just haven't had time to sit down and process it. I'm not sure I'm 100% in love with how it turned out, so maybe I'll revisit this data in the future or incorporate it into my next attempt.

How it was constructed:
I spent a lot of time thinking about how to piece this one together with the data I had - I wanted to do a narrowband-enhanced broadband image. Ultimately, I took the SII stack and combined it with the Ha stack (giving the SII preference wherever it had more structure) and pasted that into red giving it 50% luminosity. I then pasted the OIII into both the green and blue stacks, again giving the OIII 50% luminosity in each channel. I assembled the RGB from that. I then also made a bicolor stack from the Ha/SII and OIII+OIII and pasted that into the RGB and again set that to 50% luminosity (and masked a little in the core to keep the RGB color intact). I still ended up blowing out the core a little, and the colors are a little on the unique side, but I guess that's to be expected when not working with pure RGB data.

Comments

Author

Chris-PA
Chris Sullivan
License: None (All rights reserved)
4603
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Revisions

  • Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan
    Original
  • Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan
    C
  • Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan
    D
  • Final
    Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan
    E

C

I noticed that it looked completely psychedelic on my phone, so I desaturated it. The original version still looks a little better on my computer, but not everyone is using the same monitor I am...

D

Based on feedback, I decided to try to bring out the fainter areas more and try to get the coloring of the core of M42 and Running Man back to something 'normal' by going back to the RGB data.

E

Aggressive noise reduction.

Sky plot

Sky plot

Histogram

Orion Nebula / Running Man Nebula (false color), 





    
        

            Chris Sullivan