IC 4593 (PK 025+40.1, PN G025.3+40.8, BD+12 2966) Planetary Nebula in Hercules. Taken over several
nights in June and July 2013. Imaged with CCD Lab’s Q285M camera and a Celestron EdgeHD 9.25 at f10,
on a Losmandy G11/Gemini mount. The OIII and H alpha subframes were 15 and 20 minutes binned 1x1,
while the RGB subframes were 4 minutes binned 2x2 resulting in the following total exposures
(OIII+HA):(R+Ha):(G+OIII):(B+OIII) (min) = (285+400):(72+400):(72+285):(72+285). Captured with
Nebulosity, calibrated, sigma combined in Iris with other processing using PixInsight LE and
Photoshop CS. North is up.