Astronomy and Space

9 Cassiopeiae

9 Cassiopeiae (9 Cas) is a white giant star in the constellation Cassiopeia, about 2,370 light years away. 9 Cassiopeiae is classified as an A1 type giant or bright giant. One study noted peculiarities in the spectrum that could indicate a λ Boötis star, but other researchers have refuted this. At an age of 25 million years, 9 Cassiopeiae has expanded away from the main sequence after exhausting its core hydrogen and now has a radius about 26 times that of the Sun. With an effective temperature of about 7,700 K, it emits more than two thousand times the luminosity of the Sun. 9 Cassiopeiae has a number of faint companions listed in multiple star catalogues, but they all appear to be at different distances and none are thought to be gravitationally associated.

Also on this shelf

See also

• ▸Integrated Science Investigation of the Sun
• ▸Anglo-Zanzibar War
• ▸Blue supergiant

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