versions: 1280 x 1024 1680 x 1050 1920
Size: 200' x 180'
Sh2-240, also known
as Simeis 147, is a very large and very faint supernova remnant. The supernova which
created it is estimated to have occured about 100,000 years ago, at a distance of 3,000
Nikkor 300mm f/4 lens/STL-11000M/Astrodon LRGB filters/Paramount ME
Exposures: RRGB: R 12 x 20 minutes: G 12 x 5 minutes: B 12 x 5 minutes: GB binned
Date: December 19-20, 2008
Location: Landers, California, USA
Technical Notes: Individual
exposures were sigma combined and the RGB image created in Registar 1.0. Gaussian Blur was
applied to the RGB image.