Combination of 15, 3 minute exposures using an H-alpha filter.
SBIG ST-8XE CCD. 35mm Nikon lens at f/2.
Situated in the constellation Ara, is an interesting patch of bright and dark nebulosity surrounding a small open cluster. The nebulosity is NGC 6188 and the cluster is NGC 6193. The cluster is fairly weak, containing only a few scattered stars, but the nubulosity shows very well when imaged with an H-alpha filter as shown here.
When imaged at f/2, the nebula is swamped by stars, as seen in the image above. However when the lens is stopped down to f/4, the stars are much suppressed and the nebula stands out at shown in the image below.
Just at the left edge of the nebula is a small, elongated object, looking like a distorted star. This is a mass-loss star with surrounding nebulosity, NGC 6164/6165. The larger patch of nebulosity to the lower right do not appear to have a designation.
The Milky Way in H-alpha from Ara to Sagittarius.