Minkowski 2-51 (M 2-51, PK 103+00.1, PN G103.2+00.6) Planetary Nebula in Cepheus. Taken Sept. 15, 16
and Oct. 7, 8, 9 and 10, 2018. Imaged with Starlight Xpress’ SX-825 camera and a Celestron EdgeHD
9.25 at f10, on a Losmandy G11/Gemini mount. The H alpha and Oiii subframes were 15 minutes binned
1x1, while the RGB subframes were 4 minutes binned 2x2, resulting in the following total exposures
L:R:G:B = (HA+OIII):(R+Ha):(G+OIII):(B+OIII) (min) = (390+375):(64+390):(64+375):(64+375). This
image is displayed at 0.57 arc-seconds per pixel. Captured with Nebulosity, calibrated, sigma
combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.