SNR 0509-67.5 is a remnant from a supernova in the Large Magellanic Cloud, that is 160,000 light years away in the constellation Dorado. It displays a clear shock wave shock shell pattern.
It was probably a Type Ia supernova, as indicated by the detection in 2004 of the elements silicon and iron. Any surviving stars should not have moved far from the site of the explosion. From Wikipedia
