The Crescent Nebula (also known as NGC 6888) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.
Image taken from the Negev desert Israel on May 27, 2017, May 19, 2018 & Jun 15, 2018.
This is an RGB, Ha, OIII version.
This also is an up close view of the nebula with only minor cropping at the adges that made from stacking errors.
Image details:
RGB- 7x540sec @ -15*c` bin 1x1 (for each filter), total- 3h,9min
Ha- 17x1200sec @ -10*c` bin 1x1, total- 5h,40min
OIII- 12x1200sec @ -10*c` bin 2x2, total 4h
Total integration time- approx 13h
Dark 20, Bias 50, Flat 30, were added for each filter.
Equipment details:
Mount- Losmandy G11 G2 modified
Scope- William Optics 152mm f/8 LZOS OK-4 optics
Camera- Starlight Xpress Trius SX694 mono & SX Filter Wheel & Astrodon 36mm unmounted E series Gen2 LRGB,Ha,OIII
Guider- SX Lodestar & SX OAG
Flattener- TSFlat2.5, 2.5".
Software:
Camera & mount control- SGP via Ascom
Guiding- PHD
Sky chart- Stellarium
Mount main control- Gemini.net via Ascom
Registration, Calibration & stacking images- Maxim DL5
Processing- PS CS6
Note: I took another 9 hours of LUM data from this object on 3 differant dates in 2017 but didn`t combine them to the image, will use this data on another version that still in progress.