This is a picture of SH2-157, also known as, the Claw Nebula. It is an emission nebula in the constellation of Cassiopeia.
Date: October 14 and 20, 2011
Location: Rancho Hidalgo, NM
Telescope: TEC-140 (F7)
Camera: SBIG ST-8300M
Mount: AP900 GTO
HA: 15x20 minutes (unbinned)
Luminance: 18x10 minutes (unbinned)
Red: 9x10 minutes (binned 2x2)
Green: 9x10 minutes (binned 2x2)
Blue: 9x10 minutes (binned 2x2)