Contains: IC 435, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 432, IC 431, The star Alnitak (ζOri), The star σOri
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Flame and Horsehead Nebula Wide Field HaRGB

Technical card

Imaging telescope or lens: Stellarvue SV70T

Imaging camera: ZWO ASI1600MM-Cool

Mount: Astro-Physics Mach1GTO

Guiding telescope or lens: Finder Guider

Guiding camera: ASI 120MM-S

Focal reducer: Stellarvue SFFR-70APO

Software: KDE Project Kstars/EkosINDILibPhotoshop CS3

Filters: Astrodon Ha 1.25" 5nmBaader RGB 1.25''

Resolution: 2208x1612

Dates: Dec. 30, 2017Jan. 13, 2018

Baader B 1.25'' CCD Filter: 90x60" (gain: 139.00) -25C bin 1x1
Baader G 1.25'' CCD Filter: 90x60" (gain: 139.00) -25C bin 1x1
Astrodon Ha 1.25" 5nm: 58x300" (gain: 200.00) -25C bin 1x1
Baader R 1.25'' CCD Filter: 45x60" (gain: 139.00) -25C bin 1x1

Integration: 8.6 hours

Avg. Moon age: 19.03 days

Avg. Moon phase: 50.61%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 20.50 job: 1894215

RA center: 85.190 degrees

DEC center: -2.689 degrees

Pixel scale: 4.642 arcsec/pixel

Orientation: 108.351 degrees

Field radius: 1.763 degrees


I test of combining Ha from my light polluted home with RGB from a SQM 21 site. Overall the blending wasn't too hard. I think the very cold weather might have started pinching the optics in my SV70T as I saw much more odd artifacts around brighter stars than I normally see. I tried to clean it up some in Photoshop but thought it gives the image some character since that is just one of the things that happens when imaging.

I'm really impressed now when I see some of the nice deep images of this area - I have almost 9 hours into this one and it could definitely benefit from 2x as much.




Sky plot

Sky plot


Flame and Horsehead Nebula Wide Field HaRGB,