HR Lyrae
Encyclopedia
HR Lyrae or Nova Lyrae 1919 was a nova
which occurred in the constellation
Lyra in 1919 with a brightness of 6.5 mag
.
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
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Lyra in 1919 with a brightness of 6.5 mag
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...
.
External links
- http://www.britastro.org/vss/obj-18.html
- http://astro.corlan.net/stars/LYR/HR-LYR.html
- http://www.tsm.toyama.toyama.jp/curators/aroom/var/nova/1910.htm