Saturday, 10 November 2012

The Veil nebula and NGC7000

NGC6960. The Veil Nebula. This supernova remnant subtends three degrees, that is six moon diameters. It surrounds the star Cygi 52 in the constellation of Cygnus, at a distance of about 1,400 light years. Five minute sub frames and matching dark frames were captured with the camera temperature set at -15 degrees. A ten inch, f/4.8 Newtonian was used with PHD auto guiding.The total exposure time was ninety minutes using an Olll filter, sixty minutes with a H-alpha filter and thirty minutes through each RGB colour filter:



Looking furthet to the east we have NGC6992, the eastern section of the Veil Nebula. This image contains narriow band data only with exposure times of sixty minutes for the Olll and H-alpha filters using five minute sub frames:



NGC7000 . The North America Nebula . This emission nebula lies at a distance of about 1,800 light years and subtends an angle of six degees. Sixty second sub frames were stacked with matching dark frames. A total exposure time of 60 minutes was made in in H-alpha and 20 minutes for each RGB colour filter: