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S Andromedae

SN 1885A

Supernova remnant in Andromeda

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Proper Name	None
Bayer Designation	None
Flamsteed Number	None
HR (BSC)	182
HD	3969
Constellation	Andromeda
Right Ascension	0h 42m 43s
Declination	+41° 16' 3"
Distance	S Andromedae is within the Andromeda Galaxy, which has an estimated distance of c.2,500,000 light years / c.800,000 parsecs
Magnitude	Apparent: +16.00 Absolute: -8.43 (At its brightest in 1885, S Andromedae reached an apparent magnitude of +5.85)
Spectral Class	SN I Supernova remnant
Optimum Visibility	October

S Andromedae is the remnant of a supernova that occurred within the Andromeda Galaxy, just a few arcseconds from the centre of that galaxy as seen from Earth. Its current magnitude is an extremely faint +16.00, but when it erupted in 1885, its brightness briefly increased to the point where it was on the edge of naked-eye visibility. Imagery provided by Aladin sky atlas

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