SNR 0104 is a supernova remnant with an unusual shape.

Found 190,000 light-years away in our neighboring galaxy
the Small Magellanic Cloud,
SNR 0104 is suspected of being the expanding debris cloud from a
Type 1a
supernova - the catastrophic thermonuclear explosion of
a white dwarf star.

http://www.astronet.ru/db/msg/1235071/