NGC 6894 (PN G069.4-02.6, PK 069-02.1, Hen 2-460) Planetary Nebula in Cygnus. The red area to the
upper right of NGC 6894 is part of the Interstellar Medium that is being ionized by the central star.
Taken over several nights in Aug 2014. Imaged with CCD Lab’s Q285M (QHY2Pro) camera and a Celestron
EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount. The OIII and H alpha images 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 = (H+Oiii) : (R+Ha) : (G+OIII) : (B+OIII) (min) = (285+285) : (64+285):
(64+285):(64+285). Captured with Nebulosity, calibrated and sigma combined in Iris with other
processing using PixInsight LE and Photoshop CS. North is up.