알레나: 두 판 사이의 차이

'''알레나''' 또는 '''쌍둥이자리 감마'''(γ Gem)는<ref name="IAU-CSN">{{cite웹 web인용|url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt|title=IAU Catalog of Star Names|accessdate=2016-07-28}}</ref> [[쌍둥이자리]] 방향에 있는 [[항성]]으로 쌍둥이자리 내에서 세 번째로 밝게 보인다. [[겉보기등급|겉보기 등급]]은 1.9로<ref name="sps1966" /> 도심지에서도 맨눈으로 쉽게 볼 수 있다. [[히파르코스 (인공위성)|히파르코스 위성]]의 [[시차 (천문학)|시차]] 자료에 따르면 알레나는 대략 [[지구]]로부터 109 [[광년]] 떨어져 있다.<ref name="aaa474_2_653" />

'''쌍둥이자리 감마'''는 항성을 [[바이어 명명법]]으로 부른 이름이다. 전통적인 애칭 '''알레나'''는 [[아랍어]] الهنعة (‘알 하나’, [[낙타]] 목에 있는 [[낙인]])에서 유래한 것이다. 또다른 애칭인 '''알메이산'''은 아랍어 المیسان (‘알 마이산’, 빛나는 것)에서 온 것이다. ‘알 하나’는 알레나, 쌍둥이자리 뮤(테자트 포스테리어), 누, 에타(테자트 프라이어), 크시(알지르) 별들을 하나로 묶어 부르는 이름이었다. 이 별들은 ‘알 누하트’의 ‘곱절’ 의미를 지닌 ‘알 누하타이’로 불리기도 했는데 그 뜻은 ‘낙타의 혹’이다.<ref name="allen1963" /> 2016년 [[국제천문연맹]] 내 항성명칭심의위원회(WGSN)는 항성의 고유명칭을 목록화, 공식 명칭으로 고시하였으며 알레나 역시 해당 목록에 포함되었다.<ref name="WGSN">{{cite웹 web인용|url=https://www.iau.org/science/scientific_bodies/working_groups/280/|title=IAU Working Group on Star Names (WGSN)|accessdate=2016-05-22}}</ref><ref name="WGSN1">{{cite웹 web인용|url=http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf|title=Bulletin of the IAU Working Group on Star Names, No. 1|accessdate=2016-07-28}}</ref>

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