Stellar Characteristics
Asteroseismic analysis of the star reveals it is approximately 10% more massive than the Sun and significantly older, at around 6,340 million years. The radius of the star is 36% greater than that of the Sun and it is 90% more luminous. The star contains twice the abundance of iron relative to hydrogen of our Sun and is therefore described as metal-rich. Mu Arae is also more enriched than the Sun in the element helium.
Mu Arae has a listed spectral type of G3IV–V. The G3 part means the star is similar to our Sun (a G2V star). The star may be entering the subgiant stage of its evolution as it starts to run out of hydrogen in its core. This is reflected in its uncertain luminosity class, between IV (the subgiants) and V (main sequence dwarf star stars like the Sun).
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