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Alpha Herculis
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== System == [[File:Double star Alpha Hercules.jpg|left|thumb|A view of Alpha Herculis in a small telescope. The components A and B are resolved with angular separation of 4.64<nowiki>''</nowiki> (in 2020).]] Alpha Herculis is a triple star system. The primary (brightest) of the three stars, designated Ξ±<sup>1</sup> Herculis or Ξ± Herculis A, is a pulsating variable star on the [[asymptotic giant branch]] (AGB). The primary star forms a visual binary pair with a second star, which is itself a spectroscopic binary.<ref name=moravveji/> Alpha Herculis also forms the A and B components of a wider system <!-- system? --> designated WDS J17146+1423, with two additional faint [[double star|visual companions]] designated WDS J17146+1423C and D.<ref name="WDS"/> The two fainter stars are far more distant than the triple system.<ref name=dr2cd/>
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