Seagull Nebula in H-alpha (IC 2177)

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About this Image

IC 2177 (also cataloged as Gum 1) is a region of hydrogen alpha emission located in the constellation Monoceros (the Unicorn). It is shown as the bright, roughly circular region in the upper center of the image, with a central vein of dark dust coursing through it. IC 2177 is associated with a broad expanse of nebulosity that extends across the whole field of view, it nicely illustrates why this object is sometimes referred to as the Seagull Nebula. North is top left.


Technical Details
Optics

105mm TMB refractor with TMB flattener at f/6.5

Mount MK-100 GEM
Camera SBIG STL-11000M at -20C, internal filter wheel
Filters Astronomik H-alpha (15 nm)
Date H-alpha: Mar 18, 2005.
Location Wildon/Austria
Sky Conditions mag 5 sky, moon up, temperature 10 C,
Exposure Ha = 60 minutes (15-minute sub-exposures),
all 1x1.
Processing Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP in ImagesPlus; Noise reduction by Neatimage;
Photoshop: curves and final processing;