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'''6 Cassiopeiae''' (6 Cas, HD 223385, HIP 117447, V566 Cas) is a [[hypergiant star]] in the [[constellation]] of [[Cassiopeia]].<ref name=illinois>{{cite web|url=http://stars.astro.illinois.edu/sow/6cas.html|title=6 Cas|accessdate=December 29, 2021|publisher=stars.astro.illinois.edu|author=Jim Kaler|date=September 13, 2003}}</ref> "6 Cassiopeiae" is the [[Flamsteed designation]] for the star, where stars are numbered by their [[right ascension]] relative to other stars present in the constellation they're in. The star is faint, shining at the fifth [[star magnitude|magnitude]], but is just about bright enough to be visible with the unaided eye where it has a white color.

'''6 Cassiopeiae''' (6 Cas, HD 223385, HIP 117447, V566 Cas) is a [[hypergiant star]] in the [[constellation]] of [[Cassiopeia]].<ref name=illinois>{{cite web|url=http://stars.astro.illinois.edu/sow/6cas.html|title=6 Cas|accessdate=December 29, 2021|publisher=stars.astro.illinois.edu|author=Jim Kaler|date=September 13, 2003}}</ref> "6 Cassiopeiae" is the [[Flamsteed designation]] for the star, where stars are numbered by their [[right ascension]] relative to other stars present in the constellation they're in. The star is faint, shining at the fifth [[star magnitude|magnitude]], but is just about bright enough to be visible with the unaided eye where it has a white color.

6 Cassiopeiae lies around 6154.03 [[light year]]s from [[Earth]].<ref name=universeguide/> The star is quite large with an estimated mass of 25 [[solar mass]]es and radius 170 time larger than the [[Sun]]'s.<ref name=nineplanets>{{cite web|url=https://nineplanets.org/cassiopeia-constellation/|title=Cassiopeia Constellation|accessdate=December 29, 2021|publisher=nineplanets.org|date=July 14, 2020}}</ref> The star's surface is believed to have a temperature of 10,023&nbsp;K, which combined with the stars great radius mean it emits more than 200,000 times the energy that Sol does. The star's intrinsic brightness results in an [[absolute magnitude]] of around -6, but the sheer distance to the star along with an interveneing dust cloud dims this to +5.43.<ref name=illinois/> The star rotates slowly with an equitorial speed of 50&nbsp;km/s which means it takes 170 days for 6 Cassiopeiae to complete one revolution. It also produces a variable but strong [[stellar wind]] that can ejects matter from the star at speeds up to 180&nbsp;km/s.

6 Cassiopeiae lies around 6154.03 [[light year]]s from [[Earth]].<ref name=universeguide/> The star is quite large with an estimated mass of 25 [[solar mass]]es and radius 170 time larger than the [[Sun]]'s.<ref name=nineplanets>{{cite web|url=https://nineplanets.org/cassiopeia-constellation/|title=Cassiopeia Constellation|accessdate=December 29, 2021|publisher=nineplanets.org|date=July 14, 2020}}</ref> The star's surface is believed to have a temperature of 10,023&nbsp;K, which combined with the stars great radius mean it emits more than 200,000 times the energy that Sol does. The star's intrinsic brightness results in an [[absolute magnitude]] of around -6, but the sheer distance to the star along with an intervening dust cloud dims this to +5.43.<ref name=illinois/> The star rotates slowly with an equatorial speed of 50&nbsp;km/s which means it takes 170 days for 6 Cassiopeiae to complete one revolution. It also produces a variable but strong [[stellar wind]] that can ejects matter from the star at speeds up to 180&nbsp;km/s.

The star is known to be a type of pulsating [[variable star]] known as an "Alpha Cygni" type.<ref>

The star is known to be a type of pulsating [[variable star]] known as an "Alpha Cygni" type.<ref>