SN 1940B

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

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

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

References

1. "List of Supernovae". IAU Central Bureau for Astronomical Telegrams. Retrieved 12 December 2016.
2. Albert G. Petschek, ed. (2012). Supernovae. Springer Science & Business Media. p. 60. ISBN 978-1461232865.

External links

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