Mu Boötis
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| Observation data Equinox J2000.0 |
|
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 24m 29.4s |
| Declination | +37° 22' 38" |
| Apparent magnitude (V) | +4.31, +6.51 |
| Distance | 121 ± 3 ly (37 ± 1 pc) |
| Spectral type | F2IVa+G1V |
| Other designations | |
Mu Boötis (μ Boo / μ Boötis) is a triple star system in the constellation Boötes. It also has traditional names Alkalurops (or Inkalunis/Icalurus or Clava or Venabulum), and also has the Flamsteed designation 51 Boötis. Mu Boötis is approximately 121 light-years from Earth.
It is known as 七公六 (the Sixth Star of the Seven Excellencies) in Chinese.
The primary component, μ¹ Boötis, is a yellow-white F-type subgiant with an apparent magnitude of +4.31.
Separated from the primary by 108 arcseconds on the sky is the binary star μ² Boötis, which has a combined spectral type of G1V and a combined brightness of +6.51 magnitudes. The componets of μ² Boötis have apparent magnitudes of +7.2 and +7.8 and are separated by 2.2 arcseconds. They complete one orbit about their common centre of mass every 260 years.
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