Crescent Nebula NGC 6888

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Following the extreme pars of the Gamma Cygni nebula in the direction of the galactic center, we reach the NGC6888 nebula, nicknamed Crescent because of the shape resembling a crescent Moon.
 

Technical Data
Optics	Pentax 75 apochromatic refractor
Focal Lenght	500 mm
Focal Ratio	f/6,7
Exposure Time	45 min exposure
Film	Kodak E200
Developement sensibility	320 ISO
Location	Capanne di Cosola (AL, on the Appennines, Italy) at 1500m
Date and time of exposure start	20 september 2003, 23.09 UT
Mount	Gemini G41
Tracking	ST4
Temperature and humidity	T=+11°C, RH=81%
Notes	-

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