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Proper NameNone
Bayer DesignationMu Herculis; Mu1 Herculis (A), Mu2 Herculis (BC)
Flamsteed Number86 Herculis
HR (BSC)6623
Right Ascension17h 46m 28s (A), 17h 46m 25s (BC)
Declination+27° 43' 15" (A), +27° 43' 2" (BC)
Distance27 light years
8 parsecs
MagnitudeApparent: +3.42 (A), +10.20 (BC)
Absolute: +3.82 (A), +10.26 (BC)
Spectral ClassG5IV yellow subgiant (A)
M3.5V red dwarf (BC)
Optimum VisibilityJune / July

Though Mu Herculis appears as a single star in this image, it is in fact a multiple system consisting of pair of binaries. The bright central star is a yellow subgiant with a red dwarf in a very close orbit, and in combination these comprise the 'A' component (also known as Mu1 Herculis or Mu Herculis Aab). Slightly to the southwest (though not separately distinguishable in this image) is a second pair of red dwarf stars, the BC component (also designated Mu2 Herculis). Imagery provided by Aladin sky atlas


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