Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)
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Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula, 



    
        

            andrea tasselli
Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula
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Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula

Getting plate-solving status, please wait...
Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula, 



    
        

            andrea tasselli
Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula
Powered byPixInsight

Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula

Acquisition details

Dates:
Dec. 15, 2021 ·  May 14, 2022 ·  May 20, 2022 ·  May 28, 2022 ·  June 6, 2022 ·  June 11, 2022
Frames:
Optolong L-Pro 2": 34×180(1h 42′) (gain: 120.00) -20°C bin 1×1
Optolong L-eNhance: 127×180(6h 21′) (gain: 120.00) -10°C bin 1×1
Integration:
8h 3′
Avg. Moon age:
14.91 days
Avg. Moon phase:
64.86%
Bortle Dark-Sky Scale:
7.00
Mean FWHM:
2.43

Basic astrometry details

Astrometry.net job: 5959034

RA center: 20h16m09s.6

DEC center: +43°3907

Pixel scale: 0.781 arcsec/pixel

Orientation: 23.676 degrees

Field radius: 0.512 degrees

Resolution: 3828x2758

File size: 6.9 MB

Locations: Home, Lincoln, United Kingdom

Data source: Backyard

Description

This is my last (in order of time) image with my 8" Maksutov-Newton as it needs some serious TLC to address tilting issues with the focuser (and no easy replacement either). So it must stand down for the moment being.

I started this image in the back end of 2021 as Cygnus was about to set (not actually, as it never sets in my northernly latitude but it sinks low enough to be virtually invisible) and was intrigued by the appearance of this nebula, aptly nick-named the Propeller. I resumed imaging it during the "bright time" in late spring -early summer, when there is no astronomical twilight and the Sun skims below the norther horizon for the whole night (the whole 4 hours of it!). This forced me to use the L-eNhance filter to bring out the nebulosity as much as possible. The final image is a blend between the "normal" exposures, taken with the L-Pro and the "narrowband" ones, taken with the L-eNhance. Because the limited expsoure time I had to press harder than usual on the noise reduction and that gives the "smoother" look this nebula has, compared to others in my portfolio.

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Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula, 



    
        

            andrea tasselli

In these public groups

Maksutov imaging