NGC 6695 and 6992: 'The eastern part of the Veil Nebula'
Object type: bright emission and/or reflection nebula in Cygnus
Size: ~ 60 x 8'
Visual Brightness: ~ 7.0
Constellation: Cygnus
Date: 2007-06-09
Location: Postalm/Austria (1300m)
Telescope: TMB 80/480 (3.1" Apo f=480mm) + 0.8 TV reducer/flattener
Camera: Starlight XPress SXV-H9
Astronomik H-alpha filter (13nm)
Image type: Ha
Binning: all 1x1
Exposure time: Ha
5x20m
Exposure time total: 1h 40m
Discovered on 1784 September 5 by William Herschel.
The Veil Nebula, also known as the Cygnus Loop or the Witch's Broom Nebula, is a large, relatively faint supernova remnant in the constellation Cygnus. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area of 3 degrees. The distance to the nebula is not precisely known, with estimates ranging from 1,400 to 2,600 light years. It was discovered on 1784 September 5 by William Herschel. He described the western end of the nebula as "Extended; passes thro' 52 Cygni... near 2 degree in length." and described the eastern end as "Branching nebulosity... The following part divides into several streams uniting again towards the south."
More information can be found at:
http://en.wikipedia.org/wiki/Veil_nebula