NGC 3109 is a small barred Magellanic irregular galaxy (although there is some speculation that it may be a spiral galaxy) it is 4.3 million light years away in Hydra.
It is thought to be interacting with the Antlia dwarf elliptical galaxy PGC 29194 which is approximately the same distance from here.
The disk of the galaxy is composed of stars of varying ages while the halo appears to have only old stars. The galaxy does not appear to have a nucleus.
Imaged in LRGB on our Planewave CDK 1000 at Observatorio El Sauce, Chile.
Image Processing: Mike Selby