NGC 6309 (PN G009.6+14.8, PK 009+14.1, HEN 2-206) Planetary Nebula in Ophiuchus. Taken June 21, 22,
23, July 09, 11, 12, 13 and July 14, 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 12 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) = (264+252):(64+264):(64+252):(64+252).
Captured with Nebulosity, calibrated, sigma combined in Iris with other processing using
PixInsight LE and Photoshop CS. North is up.