SN 1999by

SN 1999by
Event typeSupernova
Iap
DateApril 30, 1999
ConstellationUrsa Major
Right ascension09h 21m 52.07s
Declination+51° 00′ 06.6″
EpochJ2000
Redshift0.0038 
HostNGC 2841
Notable featuresPeculiar spectrum
Peak apparent magnitude13.10±0.05

SN 1999by was a peculiar Type Ia supernova event in the spiral galaxy NGC 2841, located in the northern constellation of Ursa Major. It was one of the most subluminous supernovae of this type ever observed.

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