NGC 3114 is a sparse open cluster on the outskirts of the Carina Complex.
It is proximate to a region of Hydrogen Alpha and some low level OIII.
The structure of the H alpha and OIII appears similar to that of a supernova remnant.
Imaged in LRGB Ha and OIII on my Planewave DR 350 at Observatorio El Sauce, Chile.
Image Acquisition and Processing: Mike Selby