Messier 46 (M46 or NGC 2437) is a bright open cluster approximately 5,500 light-years away in Puppis.
NGC 2438 is the planetary nebula right above M46. It is located approximately, 3,000 light-years away. It is illuminated by an estimated 17.7 magnitude central star.
The rose-colored planetary PN M 1-18 (PK 231+04 1) is located near the center at the top.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged January 15th and March 15th, 2015 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/16657216397/sizes/l