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Kappa Ursae Majoris
Kappa Ursae Majoris (Kappa UMa, κ Ursae Majoris, κ UMa) is a binary star in the constellation Ursa Major. It is approximately 358 light years from Earth and has the traditional names Talitha Australis, Al Kaprah, and Alphikra Australis.
Both components of the binary star are a white A-type main sequence dwarfs. They have apparent magnitudes of +4.2 and +4.4, which gives the system a combined apparent magnitude of +3.60.〔 The orbital period of the binary is 35.6 years (13,007.2 days), and the two stars are separated by 0.18 arcseconds.〔
==Name and etymology==
*The traditional name ''Talitha (share with ι UMa) comes from the Arabic phrase "the third spring, or leap, of the ghazal".〔(Richard Hinckley Allen :Star Names — Their Lore and Meaning - Ursa Major, the Greater Bear )〕 The term ''Australis'' meaning "the south side" in Latin.
*In Chinese, (), meaning ''Three Steps'', refers to an asterism consisting of κ Ursae Majoris, ι Ursae Majoris, λ Ursae Majoris, μ Ursae Majoris, ν Ursae Majoris and ξ Ursae Majoris. Consequently, κ Ursae Majoris itself is known as (, (英語:the Second Star of Three Steps)) and (, (英語:Star of Second Upper Step)).〔 ((Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 21 日 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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