M6 (NGC 6405, Collinder 341, the Butterfly Cluster and others) is a bright open cluster located approximately 1,600 light-years away in Scorpius. At -32 degrees declination, it barely reaches an altitude of 18 degrees from my imaging site.
NGC 6416 is the open cluster and the center left of the image.
Barnard 278 is the dark nebula between NGC 6416 and M6.
Barnard 275 is the dark nebula on the right (west) side of M6.
The red nebulosity at the bottom right is part of Sharpless 12. Trumpler 28 is the small open cluster that appears embedded in it.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged on June 5th and 7th, 2016 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/26939336543/sizes/l