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Crescendo in Space

8/23
ASI2600MM Pro, 360mm f/2.8, 7h (RGB 3x18min, Lum 24min, Ha 1.5h, S 1,4h, O 2.8h)

The constellation Cygnus hosts many quite interesting targets and offers plentiful motifs for any focal range.

This widefield image was taken with a focal length of 360mm and focuses on the nebulosity around SH2-105/NGC6888/C27 or simply The Crescent Nebula.

This is a rather faint object to the naked eye and most likely was named the Crescent Nebula by William Herschel as he only could discover the brighter edge anno 1792.

In fact this is a rather rare type of object, a so called Wolf-Rayet-Nebula. With some similarities to supernova remains, we do see the collission from the very fast stellar winds emitted by its star WR136 with its former hull, thrown away several thousand years ago.

If you examine the image very closely, you may discover an even fainter object right below of NGC6888, the Soap Bubble Nebula LBN206.

This faint planetary nebula was discovered not earlier than 2007 by amateur astronome Dave Jurasewich.

Check out the annotated image which other objects could be found in this small region: