Nebula

Medusa nebula (Abell 21,  PK205+14.1)

[2010. 3. 21. 파주 파평산]
Telescope 10inch Newtonian
Mount : Takahashi NJP 200 T2
Camera :  QSI583WS, QHY5 guide
Exposure Info : Ha 600sec x 3, RGB  300sec x2(binning 2) 
Image processing : MaxIm DL & Photoshop CS 3