20170711 M27

M27 啞鈴星雲
HOO(R:Ha=0.7, G:OIII=1.1, B:OIII=1.0)
(Ha: 600s *10 frames, OIII:300s *10 frames),
Ha: guiding(7/09), OIII: free tracking(7/11).

M27
M27