NGC 2174
Alluna RC16″, fl=3430mm.
Paramount ME OAG guiding.
SBIG STL 11000M C1 at -20°C.
Hα 600s * 9 = 90mins stacked w/bais dark flat.

Part of NGC 2244
Alluna RC16″, fl=3430mm.
Paramount ME OAG guiding.
SBIG STL 11000M C1 at -20°C.
Hα 600s * 10 = 100mins stacked w/bais dark flat.
薔薇星雲近照。