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

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

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

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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

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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Description: Minor tweak to the color rendering.

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Status	Basic success
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Astrometry.net job	8723812
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Simeis 57 (a.k.a. DWB 111) HaRGBOIII (OSC) - The Propeller Nebula

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

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

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