Although imaged in 2012 - I couldn't resist revisiting it in 2015

Messier 83 (also known as the Southern Pinwheel Galaxy, M83 or NGC 5236)
is a barred spiral galaxy approximately 15 million light-years away in the constellation Hydra.
It is one of the closest and brightest barred spiral galaxies in the sky. (WIKI)

Imaged with the 16" f3.75 Dream Astrograph.
Apogee Alta U-16M camera.
L-HA-RGB image:
Luminance - 120 minutes (Bin 1)
RGB - 30 minutes per channel (Bin 2)
HA - 30 minutes (Bin 1)

Total of 4 HRS

Imaged from Tivoli farm in Namibia May 2015