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S Andromedae

SN 1885A

Proper NameNone
Bayer DesignationNone
Flamsteed NumberNone
HR (BSC)182
Right Ascension0h 42m 43s
Declination+41° 16' 3"
DistanceS Andromedae is within the Andromeda Galaxy, which has an estimated distance of c.2,500,000 light years / c.800,000 parsecs
MagnitudeApparent: +16.00
Absolute: -8.43
(At its brightest in 1885, S Andromedae reached an apparent magnitude of +5.85)
Spectral ClassSNI Supernova remnant
Optimum VisibilityOctober

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