V838 Herculis
Encyclopedia
V838 Herculis was a nova
which occurred in the constellation Hercules
in 1991 and which reached magnitude
5.0.
Nova
A nova is a cataclysmic nuclear explosion in a star caused by the accretion of hydrogen on to the surface of a white dwarf star, which ignites and starts nuclear fusion in a runaway manner...
which occurred in the constellation Hercules
Hercules (constellation)
Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today...
in 1991 and which reached magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
5.0.
External links
- http://www.tsm.toyama.toyama.jp/curators/aroom/var/nova/1990.htm
- http://www.aavso.org/vstar/vsots/v838her.shtml