This is anF-typesupergiant star with a baselinestellar classification of F7 Ib.[4] It is aClassical Cepheid variable ranging from apparent magnitude 5.93 to 6.73[10] over 7.51 days,[7] while varying between spectral types F7 Ib and G2.[10] The star was suspected of having a detectable companion,[11] but this finding was later disputed.[12]Gaia andHST observations have shown that there is a companion, a 15th-magnitude star7″ away.[13][14] There is anX-ray source with a luminosity of6.3×1029 erg s−1 located at anangular separation of1.9″ from R Muscae.[15]
^abHouk, Nancy; Cowley, A. P. (1979).Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan.Bibcode:1978mcts.book.....H.
^Eichendorf, W.; et al. (May 1982). "UV, optical and IR observations of the Cepheid R MUSCAE".Astronomy and Astrophysics.109 (2):274–278.Bibcode:1982A&A...109..274E.
^Kervella, Pierre; Gallenne, Alexandre; Remage Evans, Nancy; Szabados, Laszlo; Arenou, Frédéric; Mérand, Antoine; Proto, Yann; Karczmarek, Paulina; Nardetto, Nicolas; Gieren, Wolfgang; Pietrzynski, Grzegorz (2019). "Multiplicity of Galactic Cepheids and RR Lyrae stars from Gaia DR2. I. Binarity from proper motion anomaly".Astronomy and Astrophysics.623: A116.arXiv:1903.03632.Bibcode:2019A&A...623A.116K.doi:10.1051/0004-6361/201834210.S2CID119226246.
