SN 1940B

Event type	Supernova
SN.IIP
Date	5 May 1940
Constellation	Coma Berenices
Right ascension	12h 50m 33.0s
Declination	+25° 32′ 12″
Peak apparent magnitude	12.8
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SN 1940B was a supernova discovered on 5 May 1940 in the galaxy NGC 4725 in Coma Berenices. It had a magnitude of 12.8^[1] and became the first observed type II supernova.^{[2][clarification needed]}

SN 1940B is one of the five supernovae discovered in 1940, the other being SN 1940A, SN 1940C, SN 1940D and SN 1940E.

• Light curve Archived 2017-10-23 at the Wayback Machine on the Open Supernova Catalog Archived 2016-03-03 at the Wayback Machine
• SN 1940B at SIMBAD

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