Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Flame Nebula  ·  IC 431  ·  IC 432  ·  IC 434  ·  IC 435  ·  NGC 2023  ·  NGC 2024  ·  Orion B  ·  The star Alnitak (ζOri)  ·  The star σOri
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IC434 - Horsehead Nebula and Flame Nebula (NGC 2024), 



    
        

            Doug Gray
IC434 - Horsehead Nebula and Flame Nebula (NGC 2024)
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IC434 - Horsehead Nebula and Flame Nebula (NGC 2024)

Getting plate-solving status, please wait...
IC434 - Horsehead Nebula and Flame Nebula (NGC 2024), 



    
        

            Doug Gray
IC434 - Horsehead Nebula and Flame Nebula (NGC 2024)
Powered byPixInsight

IC434 - Horsehead Nebula and Flame Nebula (NGC 2024)

Technical card

Imaging telescopes or lenses: William Optics Zenithstar 61

Imaging cameras: ZWO ASI294MM-Pro

Mounts: iOptron CEM70  ·  iOptron Tri-Pier

Guiding telescopes or lenses: ZWO 30mm f/4 Mini Guide Scope

Guiding cameras: ZWO 290MC

Focal reducers: William Optics Flat61 for Z61

Software: Adobe Photoshop  ·  siril  ·  PHD2 Guiding

Filters: Antlia Ha 3.5nm 36mm  ·  Optolong B 36mm  ·  Optolong G 36mm  ·  Optolong R 36mm

Accessory: ZWO ASIAir Pro  ·  ZWO EFW 7x36mm


Dates:Nov. 25, 2020Nov. 30, 2020Dec. 1, 2020Dec. 3, 2020

Frames:
Optolong B 36mm: 10x300" (50') (gain: 120.00) -10C bin 1x1
Optolong G 36mm: 15x300" (1h 15') (gain: 120.00) -10C bin 1x1
Antlia Ha 3.5nm 36mm: 45x600" (7h 30') (gain: 120.00) -10C bin 1x1
Optolong R 36mm: 15x300" (1h 15') (gain: 120.00) -10C bin 1x1

Integration: 10h 50'

Darks: ~29

Flats: ~30

Flat darks: ~30

Bias: ~60

Avg. Moon age: 14.66 days

Avg. Moon phase: 92.38%


Basic astrometry details

Astrometry.net job: 4078511

RA center: 5h 40' 54"

DEC center: -2° 24' 43"

Pixel scale: 2.589 arcsec/pixel

Orientation: 97.047 degrees

Field radius: 1.277 degrees


Resolution: 2957x1967

Data source: Backyard

Description

I've been wanting to capture this target for months now, patiently waiting for Orion to rise higher in the sky. My first attempts with my dslr were encouraging, but then I saw an image posted by Antlia on the CN forums of this target. It was 16 hours on an 11" RASA f/2 with their 3.5nm Ha filter. It's amazing how much detail you can pull out with ultra narrowband filters. That picture convinced me to order their Ha filter (and eventually the O-III and S-II filters as well). Obviously my version has a lot less detail, but I'm still very impressed with what I was able to capture with my much smaller and slower scope.

I captured some L data as well, but decided not to use it. I added (linear dodge with 80% opacity) the Ha data to the R channel and also used it as an overall luminance layer. I did some local curves adjustment to the flame nebula and ngc 2023, then an additional stretch and camera raw filter adjustments in photoshop. I struggled quite a bit with the halos and had to reset my progress a few times to go back and reduce them earlier in the process. They are still there of course, but hopefully less distracting than my first few attempts.

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IC434 - Horsehead Nebula and Flame Nebula (NGC 2024), 



    
        

            Doug Gray