<P> The brightest star is the magnitude 2.2 Alpha Coronae Borealis . The yellow supergiant R Coronae Borealis is the prototype of a rare class of giant stars -- the R Coronae Borealis variables -- that are extremely hydrogen deficient , and thought to result from the merger of two white dwarfs . T Coronae Borealis , also known as the Blaze Star , is another unusual type of variable star known as a recurrent nova . Normally of magnitude 10 , it last flared up to magnitude 2 in 1946 . ADS 9731 and Sigma Coronae Borealis are multiple star systems with six and five components respectively . Five star systems have been found to have Jupiter - sized exoplanets . Abell 2065 is a highly concentrated galaxy cluster one billion light - years from the Solar System containing more than 400 members , and is itself part of the larger Corona Borealis Supercluster . </P>
<P> The brightest star is the magnitude 2.2 Alpha Coronae Borealis . The yellow supergiant R Coronae Borealis is the prototype of a rare class of giant stars -- the R Coronae Borealis variables -- that are extremely hydrogen deficient , and thought to result from the merger of two white dwarfs . T Coronae Borealis , also known as the Blaze Star , is another unusual type of variable star known as a recurrent nova . Normally of magnitude 10 , it last flared up to magnitude 2 in 1946 . ADS 9731 and Sigma Coronae Borealis are multiple star systems with six and five components respectively . Five star systems have been found to have Jupiter - sized exoplanets . Abell 2065 is a highly concentrated galaxy cluster one billion light - years from the Solar System containing more than 400 members , and is itself part of the larger Corona Borealis Supercluster . </P>
what is the brightest star in corona borealis
what is the brightest star in corona borealis
the magnitude 2.2 Alpha Coronae Borealis
the magnitude 2.2 Alpha Coronae Borealis