9 lines
778 B
Markdown
9 lines
778 B
Markdown
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name: R CrB
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constellation: CrB
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created_by: 8mag
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created_date: 2022-01-21 17:00:00
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updated_by: skybber
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updated_date: 2022-01-25 15:54:03.001927
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the main representative of the working group of variable stars, in which a sudden drop in brightness of up to several stellar classes occurs at irregular intervals. The apparent brightness of this brilliant supergiant stays at 5.8mag most of the time, then drops to 13.8mag within a few weeks or sometimes to 15mag and stays that way for several months. This is because the supergiant ejects a huge cloud of carbon-rich gas by thermonuclear reaction into the surroundings, which obscures the star's light and causes the sharp drop in brightness we see. When the cloud dissipates, the star shines again with its light unabated. |