NGC 6905 (PN G061.4-09.5, PK 061-09.1, Hen 2-466) Planetary Nebula in the constellation Delphinus.
Taken July 22, 23, 24, 25, 26 and July 27 2017. Imaged with Starlight Xpress’ SX-825 camera and a
Celestron EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount. The OIII and H alpha subframes were 15
minutes binned 1x1, while the RGB subframes were 4 minutes binned 2x2, resulting in the following
total exposures (HA+OIII):(R+Ha):(G+OIII):(B+OIII) (min) = (300+315):(60+300):(60+315):(60+315).
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.