Sculptor semi-dwarf galaxy NGC 7793.
The nebula S26 associated with a microquasar can be seen as an elogated red blob near the edge of the galaxy at about 8 o'clock. (See also the same image in H-alpha).
Notice the pair of tadpole=like interacting galaxies near the top of the left hand edge of the image.
Luminance 16hrs (16x1hr unbinned), RGB 6hrs (4x30 min 2x2 each channel). Aspen CG16M on 20" PlaneWave. Processed with our own GoodLook 64.