Arcturus
Arcturus. Quinn Foussianes. Size. The Sun. Arcturus. Almost 22,000,000 miles in diameter. 1,391,980 km or 864,938 miles in diameter. Temperature. The Sun . Arcturus. 4290 degrees Kelvin.* . 6,000 degrees Celsius or 10,000 degrees Fahrenheit, or 5778 degrees Kelvin.* .
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