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74 Aquarii
74 Aquarii is a triple star〔 system in the constellation Aquarius. The combined apparent visual magnitude is 5.8〔 and it is located at a distance of from Earth.〔 It has the variable star designation ''HI Aquarii''.
The inner pair of stars form a double-lined spectroscopic binary, where the presence of both components is revealed from the Doppler shift of their spectral lines. They have an orbital period of 3.4298 days. A third component is orbiting the inner pair with an 18 year period at a typical angular separation of 0.078 arcseconds. In 2010, this component was at an angular separation of 0.069 arcseconds along a position angle of 285.9°. This is equivalent to a projected linear separation of .〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「74 Aquarii」の詳細全文を読む
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