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Omega Nebula M17 in SHO, 


            Stefan Westphal

Omega Nebula M17 in SHO

Technical card

Resolution: 2311x1744

Dates:July 10, 2015July 11, 2015

Baader Planetarium Ha 36mm 7nm: 14x600" -20C bin 1x1
Baader O III 8.5nm: 14x600" -20C bin 1x1
Baader SII 8.5nm: 13x600" -20C bin 1x1

Integration: 6.8 hours

Darks: ~8

Flats: ~27

Bias: ~160

Avg. Moon age: 24.43 days

Avg. Moon phase: 26.86%

Bortle Dark-Sky Scale: 2.00

Mean FWHM: 3.80 job: 710826

Locations: Emberger Alm - Sattlegger, Greifenburg, Kärnten, Austria


Image Data:
Date: 10.,11.07.2015
Location: Emberger Alm / Austria
Telescope: 17,5" f/4,8 Newton - 2000mm
Corrector: Gyulai GPU
Camera: Atik 383L+ at -20°C
integration time: Ha OIII SII 140:140:130min
Guiding: Ts Off Axis Guider and M-Gen ll
Processing: DSS, Fitswork, Photo Shop CS6

This image is an attempt to present the Omega Nebula as Hubble palette.
I used the narrowband instruction of Bob Franke for creating the Hubble palette. Additionally I used my own workflow to create the image in false color.
This picture was taken with the great newton of the observatory on the Emberger Alm / Austria.
Unfortunately, the seeing was just average. So, it was difficult for me to bring more sharpness and detail of the data.
I think you can make full use of the power of this great telescope only in perfect nights.

I hope my result will like anyway.

Clear Skies,



Stefan Westphal


  • Omega Nebula M17 in SHO, 


            Stefan Westphal
  • Final
    Omega Nebula M17 in SHO, 


            Stefan Westphal
  • Omega Nebula M17 in SHO, 


            Stefan Westphal


Omega Nebula M17 in SHO, 


            Stefan Westphal