R Muscae is a yellow-white hued variable star in the southern constellation of Musca. It has a nominal apparent visual magnitude of 6.31,[ which is near the lower limit of visibility to the naked eye. The distance to this star, as determined from its annual stellar parallax of ,][ is around 3,260 .
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This is an F-type star supergiant star with a baseline stellar classification of F7 Ib.[ It is a Classical Cepheid variable ranging from apparent magnitude 5.93 to 6.73][ over 7.51 days,][ while varying between spectral types F7 Ib and G2.][ The star was suspected of having a detectable companion,][ but this finding was later disputed.][ Gaia and HST observations have shown that there is a companion, a 15th-magnitude star away.][ There is an X-ray astronomy with a luminosity of located at an angular separation of from R Muscae.][
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