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Object Type: Supernova remnant
Constellation: Taurus
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 light-years.

Equipment: Nikkor 300mm f/4 lens/STL-11000M/Astrodon LRGB filters/Paramount ME
F-ratio: f/5.6
Exposures: RRGB: R 12 x 20 minutes: G 12 x 5 minutes: B 12 x 5 minutes: GB binned 2x2
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.