Sadr

Sadr
Sadr, one of the stars of the constellation Cygnus, and surrounding hydrogen clouds and dark dust clouds. Click the picture to see a larger view.

The bright star near the center of this image is Sadr, in the constellation Cygnus, also known as the Northern Cross.  Sadr is the point where the lines of the cross intersect.  It is difficult to make out any details of the dark nebulae in the lower part of the picture, but those dark dust clouds obscure the thick band of Milky Way stars visible in the upper right portion.  Much easier to see are the huge red clouds of hydrogen gas.

This image is a combination of the best 6 of 15 shots of 180 seconds, taken at f/5.6 and ISO 1600 with the 200mm lens.  Images were taken on Dec 26, 2013.

This was among the first images I took with the Atlas mount.  I was still learning how to guide, so the exposure times were not as long as what I take now.  I was also using a light pollution filter, so I couldn’t use the lens at the widest aperture.  I will revisit this target in the future and do much better.

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