(supernova remnant in the LMC)
N 103B is a supernova remnant in the Large Magellanic Cloud,
considered likely the remnant of a Type Ia supernova.
It located is on the edge of a HII region and not far from
a stellar cluster of young stars.
It is presumed to be less than 2000 years old, based upon its
small size and other analysis.
The name N 103B stems from a 1956 catalog
of Lyman alpha sources in the Magellanic clouds,
"N" indicating an emission nebula. It has since shown
in numerous radio and X-ray surveys.
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