Epsilon Muscae
Epsilon Muscae, Latinized as ε Muscae, is a red giant star of spectral type M5III in the constellation Musca.[6] It is a 4th magnitude star, visible to the naked eye under good observing conditions. It is about 330 light-years from the Earth.[3] Originally a main-sequence star of around 2 solar masses,[8] Epsilon Muscae is now on the asymptotic giant branch[5] and has expanded to 117 times the Sun's diameter and 1,700 its luminosity.[8] It is a semiregular variable, varying between visual magnitudes 4.0 and 4.3[4] in eight distinct periods ranging from a month to over half a year in length.[6] Its distance from the Earth is about the same as the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association, although it is moving much faster at around 100 km/s and does not share a common origin.[9] References
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