Mu Cygni

μ Cygni (latinised as Mu Cygni) is a binary star in the constellation Cygnus. Located around 22.24 parsecs (72.5 ly) distant, the system has a combined apparent magnitude of 4.50. The primary, with an apparent magnitude of 4.69, has a spectral type of F6V, and the secondary, with an apparent magnitude of 6.12, has a spectral type of G2V. Their orbit has a period of around 700 years, with a semimajor axis of 5" and an eccentricity around 0.6. Two reported additional components, C (apparent magnitude 12.93) and D (type A5 and apparent magnitude 6.94), are believed to be optical doubles rather than part of the Mu Cygni system.