Minkowski 4-9 (M4-9, Sanduleak 3-125, PK 24+05.1, PN G024.2+05.9), Planetary Nebula in Serpens
(Serpens Cauda). Taken June 29, 30 and July 01, 02, 03, 2011. Imaged with CCD Labís Q285M camera and
a Celestron EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount and presented with a slight crop and
resample. 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 L:R:G:B = (OIII+HA):(R+Ha): (G+OIII):
(B+OIII) (min) = (360+375): (60+375): (60+360):(60+360). Captured with Nebulosity, calibrated, sigma
combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.