The Clamshell Nebula (Sh2-119)
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In the rich starfields of Cygnus, the massive star 68 Cygni bathes this cloud in fierce ultraviolet light, sculpting glowing hydrogen and delicate dark dust tendrils. I captured the scene in a narrowband HSO palette to highlight the interplay between ionized hydrogen, sulfur, and oxygen—revealing the shell-like arcs and filaments that give Sh2-119 its name.

If you enjoy the look of these lesser-known Cygnus gems, tap the save button and share — there’s so much structure hiding in this region. Clear skies!

Scope: Askar 103APO
Lens: Askar 0.6x Reducer
Camera: ZWO ASI 294MC Pro
Filter: Antlia Tri-Band RGB Ultra
Mount: SkyWatcher AZ-EQ5-GT
Guiding: Svbony SV165 with ZWO ASI 224MC
Controller: ZWO ASIAir Pro

Integration time: 5hrs 40min

Full version and print available at:
https://adfr.io/astro/20250820_sh2-119

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