King 20 is a Trumpler class II 1 p open cluster located in Cassiopeia.
Luminance – 12x300s – binned 1x1 – 60 minutes
RGB – 8x180s – 24 minutes each – binned 2x2
132 minutes total exposure – 2 hours 12 minutes
Imaged November 13th, 2018 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/46316314131/sizes/l
See my full album of King open clusters here - https://www.flickr.com/photos/dcrowson/albums/72157673135685530