Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)
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Propeller Nebula - DWB 111 - Simeis 57 - Halpha, jeromeroger
Propeller Nebula - DWB 111 - Simeis 57 - Halpha
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Propeller Nebula - DWB 111 - Simeis 57 - Halpha

Getting plate-solving status, please wait...
Propeller Nebula - DWB 111 - Simeis 57 - Halpha, jeromeroger
Propeller Nebula - DWB 111 - Simeis 57 - Halpha
Powered byPixInsight

Propeller Nebula - DWB 111 - Simeis 57 - Halpha

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Description

Many problems to solve :
- I have tried to change the tilt of the camera with the ZWO screws.L But the result is not good.
- During the night, the temperature had changed and I think that the focus wasn't very good at the end.
- I have a Astronomik filter Halpha 6nm that are good until F/D=4. But the Epsilon has a F/D=3.3. May be a  Astronomik Max Fr version would give better results ?
- Always my FLAT problem. I have a Geoptik Screen Flat but when I use it, the final result is catastrophic. I don't understand what cause this inappropriate FLAT.
So I use PixinSight function : Automatic Background Extractor / Division.

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Propeller Nebula - DWB 111 - Simeis 57 - Halpha, jeromeroger