NGC 40 (PK 120+09.1, PN G120.0+09.8) Planetary Nebula in Cepheus. Taken Oct. 18, 19, 20 and Oct 21,
2020. 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+330):(64+390):(64+330):(60+330). Captured with
Nebulosity, calibrated, sigma combined in Iris with other processing using PixInsight LE and
Photoshop CS. North is up.