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Contains:  IC 435, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 431, The star Alnitak (ζOri), The star σOri
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Horsehead in HaRGB, 





    
        

            bobzeq25

Horsehead in HaRGB

Technical card

Imaging telescope or lens:Stellarvue SV70T

Imaging cameras:ZWO ASI183MC-CoolAtik 460EX Mono

Mount:CEM60

Guiding telescope or lens:Generic 240mm F4 guidescope

Guiding camera:QHYCCD QHY5III 174M

Focal reducer:Stellarvue REDUCER FLATTENER FOR SV70T - SFFR-70APO

Software:PixInsight

Filter:Astronomik Ha 6nm

Resolution: 4115x3655

Dates:Dec. 29, 2018Jan. 3, 2019

Frames:
164x30" (gain: 50.00) -20C bin 1x1
Astronomik Ha 6nm: 17x600" -20C bin 1x1

Integration: 4.2 hours

Flats: ~30

Bias: ~100

Avg. Moon age: 24.70 days

Avg. Moon phase: 27.59%

Bortle Dark-Sky Scale: 7.00

Mean SQM: 18.00

Mean FWHM: 5.00

Temperature: -5.00

Astrometry.net job: 2462357

Data source: Backyard

Description

Two nights, two cameras, a ZWO183C for the RGB, an Atik460 mono for the Ha. PixInsight handled that easily, no fuss.

Comments

Author

bobzeq25
bobzeq25
License: None (All rights reserved)
11532
Like

Revisions

  • Horsehead in HaRGB, 





    
        

            bobzeq25
    Original
  • Horsehead in HaRGB, 





    
        

            bobzeq25
    C
  • Horsehead in HaRGB, 





    
        

            bobzeq25
    D
  • Horsehead in HaRGB, 





    
        

            bobzeq25
    F
  • Final
    Horsehead in HaRGB, 





    
        

            bobzeq25
    G

C

Large improvement in dim detail by (instead of combining Ha and RGB while linear) combining Ha and RGB after separately stretching and processing. Alnitak has been beaten into submission.

D

Like this crop a bit better.

G

This has been a very interesting process. One thing I've come to realize is that the Flame, often depicted as a reflection nebula, has a great deal of H alpha. A white flame leads to an orange or pink background to the Horsehead, which I don't think is correct.

Histogram

Horsehead in HaRGB, 





    
        

            bobzeq25