Abell 13 (PN A66 13, PN G204.0-08.5, PK 204-08.1) Planetary Nebula in Orion. Taken Feb. 03, 05, 06
and Feb. 07, 2022. 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 mintues binned 1x1, while the
RGB subframes were 3 minutes binned 2x2, resulting in the following total exposures L:R:G:B =
(HA+OIII): (R+Ha):(G+OIII):(B+OIII) (min) = (300 + 132):(51+300):(51+132):(51+132). Captured with
Nebulosity, calibrated, sigma combined in Siril with other processing using PixInsight LE, Photoshop
CS and GIMP. North is up.