Abell 78 (PN A66 78, PK 81-14.1, PN G081.2-14.9), planetary nebula, in Cygnus. Taken Aug, 26, 29,
Sept 8, 9, and 10 2009. Imaged with CCD Lab’s Q285M and a C8N at f5 on a Losmandy G11/Gemini mount.
OIII and H-alpha exposures were 8 minutes, while the RGB exposures were 3 minutes resulting in the
following total exposures with the OIII and H-alpha information used for the luminosity channel
OIII+Ha:(R+Ha):(G+OIII):(B+OIII) (min) = 240+392:(60+392):(60+240):(60+240). Color balance was
achieved via numerically scaled channels. Captured with Nebulosity, calibrated and sigma combined in
Iris with other processing using PixInsight LE and Photoshop CS. North is up.

This image was published in Sky and Telescope, Vol 122, No. 5 (Nov. 2011), p57.