A supernova remnant
Simeis 147 is a supernova remnant with an apparent age of about 100,000 years. It covers nearly 3 degrees on the sky toward the direction of Taurus constellation with a typical filamentary structure. This very faint object was discovered in 1952 at the Crimean Astrophysical Observatory by using a 25-inch Schmidt camera. Because the extremely low superficial brightness, the objet is hard to photograph...
Optic: Canon 400 mm f:5.6 L.
Camera: Modified Baader Canon 350D (Ha pass filter - see
here) at ISO800. Processing: Iris
software. Exposure: 45 minutes (9 x
5 minutes). Location: Pic du Midi (altitude 2860 meters, french Pyrénées).
Date: August 31.15, 2006.
Simeis 147 is only weakly
visible in a standard color image
The nebula is more visible
by using only the red layer (negative view)
Here a high contrast version
of the black & white image (red channel)
Display a larger version - (1730 x 1150 pixels)