2To 1500x1000

Takahashi FSQ-106ED@530mm f/5.0 SBIG STL-11000M
Astrodon SII 5nm 50min., Ha 6nm 50min., OIII 5nm 40min. 11/23/2014(JST)
RGB=SII, Ha ,OIII Mapped Color
MaxIm DL6.03, StellaImage7, PhotoshopCC

Region of Horsehead Nebula in Orion
05h40m52.9 -02 28 00 Dim 6'x4' Opacity 4