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Arcturus in Boötes is the brightest K-type orange star in the skies of Earth. Other prominent examples are Capella in Auriga (though Capella is sometimes classified as a G-type yellow star), Aldebaran in Taurus and Pollux in Gemini. Imagery provided by Aladin sky atlas

A Typical K-type Star

A view of the surface of a fairly typical orange star, more properly classified as a 'K-type'.

A spectral class of relatively cool stars whose surface temperatures lie in the range 3,500 to 5,000 Kelvin, typified as having a orange colouration.


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