Abell 77 (Sh2-128, A66 77, PK 097+03.1), HII ionized-region, in Cepheus. This is a misclassified PN
(Table 3, IV/24 Catalogue of Galactic Planetary Nebulae, Kohoutek, 2001). Taken Sept. 25, Oct. 05,
Oct. 11 and Oct. 12, 2020. 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 and 15 minutes binned
1x1, while the RGB subframes were 4 minutes binned 1x1 and 2x2, resulting in the following total
exposures L:R:G:B = (HA+OIII):(R+Ha):(G+OIII):(B+OIII) (min) = (246+291):(28+246):(28+291):(28+291).
Captured with Nebulosity, calibrated, sigma combined in Iris with other processing using PixInsight LE
and Photoshop CS. North is up.