SN 1940B was a
supernova
A supernova (: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last stellar evolution, evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion ...
discovered on 5 May 1940 in the galaxy
NGC 4725 in
Coma Berenices
Coma Berenices is an ancient asterism in the northern sky, which has been defined as one of the 88 modern constellations. It is in the direction of the fourth galactic quadrant, between Leo and Boötes, and it is visible in both hemispher ...
.
It had a magnitude of 12.8 and became the first observed
type II supernova
A Type II supernova or SNII (plural: ''supernovae'') results from the rapid collapse and violent explosion of a massive star. A star must have at least eight times, but no more than 40 to 50 times, the mass of the Sun () to undergo this type ...
.
SN 1940B is one of the five supernovae discovered in 1940, the other being
SN 1940A,
SN 1940C,
SN 1940D and
SN 1940E.
References
External links
Light curve on th
Open Supernova CatalogSN 1940Bat
SIMBAD
SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data) is an astronomy, astronomical database of objects beyond the Solar System. It is maintained by the Centre de données astronomiques de Strasbourg (CDS), Fr ...
Supernovae
Astronomical objects discovered in 1940
Coma Berenices
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