Sharpless 311 (Sh2-311, NGC 2467, Gum 9, LBN 1065 + 1067 and others) is a bright nebula located approximately 20,500 light-years away in Puppis.
The open cluster at the top left is Trumpler 9.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged February 2nd and 3rd, 2016 from Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/24754703480/sizes/l