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S Andromedae
Also known as Supernova 1885, the only supernova seen to date in the Andromeda Galaxy and the first supernova observed beyond our own galaxy. It was recorded on Aug. 20, 1885, by Ernst Hartwig (1851-1923) at Dorpat Observatory in Estonia; others discovered it independently, but Hartwig was the first to realize its significance. S Andromedae reached magnitude 6 between Aug. 17 and 20, and had faded to magnitude 16 by February 1890.
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