Nova Cas 2021

N Cas 2021
Nova Cas 2021 is close to the M52

A bright nova ignited in the constellation Cassiopeia, which is also available in the binoculars. The current brightness is around 7.8 mag (March 19, 2021) and still is getting brighter. Nova was given the designation Nova Cas 2021. It can be found close to the M52.

The flare of the nova discovered Japanese Yuji Nakamura March 18, 2021 as an object 9.6 mag. The interesting thing about this object is that the variable this star was known before it ignited. It was discovered as an eclipsing variable star by the Czech observer Zbyněk Henzl, who entered it in the Czech catalog of variable stars as CzeV3217.

This is most likely a geometric variable star and in this case it would be possible to calculate orbital elements of the components and estimate their weight, which would help to understand this nova burst nature.

https://www.aavso.org/vsx/index.php?view=detail.top&oid=2216132
Sky and Telescope: A new nova in Cassiopeia, discovered on March 18th, is bright enough to see in a small telescope.

Update May 10: Estimated brightness in binocular 10×50 from Rochester MN: 5.3 mag.
The Astronomer’s Telegram: Large brightness increase of V1405 Cas (Nova Cas 2021) to naked-eye visibility
Sky and Telescope: Nova in Cassiopeia brightens suddenly

N Cas 2021
Nova Cas 2021 map
N Cas 2021
Nova Cas 2021 = V1405 Cas AAVSO Chart