Zuben Elgenubi
HIP 72622; Alpha2 Lib; 9 Lib
Sep: 230.8", Companion: mag 5.2
물리적 특성
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가시성
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다중 항성계
접안렌즈 시야
Sep: 230.8″ · PA: 314° · 위=북, 왼쪽=동
분해됨 · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
크기 비교
항성의 진화
분광 분류
헤르츠스프룽-러셀 도표
흑체 복사 스펙트럼
항성 흡수 스펙트럼
스펙트럼 유형을 기반으로 한 시뮬레이션 흡수 스펙트럼. 선 위에 마우스를 올려 원소를 식별하세요.
항성 참고사항
서베이 이미지
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Zuben Elgenubi 소개
설명
Zuben Elgenubi is a wide double star system at magnitude 2.75 in Libra, the second brightest star in the constellation. A white subgiant of spectral type A3IV, located about 77 light-years from Earth. A telescope reveals a fainter companion (magnitude 5.2) about 231 arcseconds away, making it one of the widest bright double stars in the sky.
관측 팁
Zuben Elgenubi is the more southerly of Libra's two main stars, forming the southern pan of the Scales with Zuben Elschemali to the north. The wide companion is visible in binoculars. The pair lies between Virgo and Scorpius on the ecliptic. Best observed May through July.
역사
The name Zuben Elgenubi comes from the Arabic 'al-zuban al-janubi,' meaning 'the southern claw,' from when Libra's stars were considered part of Scorpius. The Romans separated them into Libra, the only zodiacal constellation representing an inanimate object.
재미있는 사실
The ecliptic passes very close to Zuben Elgenubi, making it one of the most frequently occulted bright stars. The Moon and planets regularly pass over it, and it has been used to study the lunar limb profile during occultations.