The VV Cephei A is one of the biggest stars found in the constellation Cepheus.
It is about 5,000 light years away.
This star is recognized as a red supergiant primary as its luminosity and magnitude do not qualify it as a hypergiant.
The VV Cephei A has a solar radius between 1,050 to 1,900.
This star belongs to an eclipsing binary star system called VV Cephei which is not entirely spherical, and hence, has unstable luminosity.
It is also difficult to measure in terms of size.