The Crescent Nebula (NGC 6888) with EdgeHD 11 at F7 and F2 - 2021

This is the Crescent Nebula, also known as NGC 6888. It's is a fun and fantastic target that I worked on this year from June through early August 2021. I took 22 hours of integrations at F7 and another 8 hours with the Hyperstar v3 at F2. The F2 focal length is more like a nice wide 560mm while the F7 is around 1960mm. I neglected to show a visual of the F7 arrangement in this video. Just refer to my Celestron OAG v2 video, its the same arrangement. At one point I redid polar alignment and got it down to 6" plus clearer and more stable skies came along, lowering hfr and guiding rates.

Stacking was done in AstroPixel and then lots of final processing done in PixInsight, including the use of Starnet to help bring out some of that outer shell O3 blue/green color.

Chapters:
Intro: 00:00
Overview L-Enhance (left) vs L-Pro (right): 1:37
Stellarium Simulation View: 2:59
Nina action shot of NGC 6888 and config 3:34
PHD2 Guiding (multistar, avg was 0.49-0.68) 3:59
Crescent Nebula History Background 5:42
Update Mid July and Good Guiding (0.36") 6:26
F2 Hyperstar (Guiding around 0.76") 7:23
Final Images and Results 8:27

Telescope: Celestron 11" EdgeHD
Observatory: NexDome
Mount: iOptron Cem120
PC: Canyon I7 Mini PC
Oag: Celestron OAG
Guidecam F2: Asi290mm mini
Guidscope F2: 60mm Svbony
Guidecam: Asi174mm mini
Focuser: Rigel nStep
Camera: Asi294mc Pro
Filter drawer: Starizona
Filter: L-Enhance 2" (mostly), L-Pro 2" (around 60min out of the 22 hours)
Reducer: Celestron F7
Skies: Bortle 5

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