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Beta Reticuli : ウィキペディア英語版 | Beta Reticuli
Beta Reticuli (Beta Ret, β Reticuli, β Ret) is triple star system and spectroscopic binary in constellation of Reticulum, with an apparent magnitude of +3.84. The primary component is an orange K-type giant. It is approximately 100 light years from Earth. Beta Reticuli is moving through the Galaxy at a speed of 69.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 10,100 and 24,200 light years from the center of the Galaxy.〔(Beta Reticuli (HIP 17440) )〕 Beta Reticuli came closest to the Sun 319,000 years ago when it had brightened to magnitude 2.98 from a distance of 67 light years.〔 ==Naming== In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, (), meaning ''Snake's Head'', refers to an asterism consisting of β Reticuli and α Hydri. Consequently, β Reticuli itself is known as (, (英語:the Second Star of Snake's Head).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日 )〕
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