Northwestern Cygnus

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Clic here for a 50% crop 1194x933 (443 kB)


About this Image

The northwestern Cygnus constellation shows many emission nebulae - from the North American Nebula NGC7000, Pelican IC5070, to Gamma-Cygni IC1318 and Crescent Nebula NGC6888. The distance to this area is estimated at approx. 1600 light years.
The nebulae are excited by young, hot blue-white stars and separated by dark nebulae into at many sections. The high star density is related to the view into the galactic plane of the milky way. North is up.
Below you see a pure H-alpha monochrome image.

clic for 33% size 1200 x 888 (346 kB)


Technical Details
Optics

Canon EF 100 mm f/2.0 lens stopped f/2.8

Mount MK-100 GEM
Camera SBIG STL-11000M at -20C, internal filter wheel
Filters Astronomik H-alpha (15 nm) + RGB
Date July 05, 2004
Location Wildon/Austria
Sky Conditions mag 4.5, bad conditions, full moon, clouds, temperature 15 C
Exposure Ha:R:G:B= 25:10:10:10 minutes (5-minute sub-exposures)
all 1x1.
Processing Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus; Noise reduction by Neatimage; Photoshop: Ha-alpha blended with L and red channel; size 20/33/50%;