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RY Sagittarii

The yellow supergiant RY Sagittarii is one of the rare R Coronae Borealis stars. It has a large envelope and 30 AU away from it is a dust cloud from a former eruption. In such eruptions temperature cools down so much that carbon dust forms and eclipses the star.

Constellation: Sagittarius
Distance: 6000 light-years
Spectral class: G0
Visual magnitude: 7.2
Diameter: 60 * Sun

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    RY Sagittarii
Graphic: ESO

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