Tags: Star.

R Leonis is a red giant Mira-type variable star in the constellation Leo.The apparent magnitude of R Leonis varies between 4.31 and 11.65 with a period of 312 days. At maximum it can be seen with the naked eye while at minimum a telescope of at least 7 cm is needed. The star’s effective temperature is estimated between 2930 and 3080 kelvins and radius spans between 320 and 350 solar radii (as large as 1.36โ€“1.5 astronomical units roughly Mars’s orbital zone).

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