Rigil Kentaurus
HIP 71681; Alpha2 Cen
Sep: 8.1", Companion: mag 1.3
물리적 특성
위치 & 식별자
가시성
사용자 설정에서 관측지를 설정하세요 가시성 데이터를 확인할 수 있습니다.
다중 항성계
접안렌즈 시야
Sep: 8.1″ · PA: 5° · 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
서베이 이미지 로드 중…
Rigil Kentaurus 소개
설명
Alpha Centauri B (Rigil Kentaurus B) is the fainter component of the Alpha Centauri binary, an orange main-sequence star of spectral type K1V at magnitude 1.33. At 4.37 light-years, it is part of the nearest star system to Earth. It is slightly smaller, cooler, and less luminous than the Sun, with about 50% of solar luminosity.
관측 팁
Alpha Centauri B is easily resolved from the brighter A component in a small telescope — the pair currently has a separation of several arcseconds. Look for the slightly orange companion next to the golden primary. The orbital period is about 80 years, and the separation varies between 2 and 22 arcseconds. Not visible north of about 29°N.
역사
Alpha Centauri B has the same naming history as its primary. In 2012, a planet candidate (Alpha Centauri Bb) was announced orbiting this star, generating worldwide excitement as the nearest exoplanet, but subsequent analysis showed the detection was likely a statistical artifact. The search for planets in this system continues.
재미있는 사실
Alpha Centauri B experiences significantly different seasons and day lengths than Earth due to the gravitational influence of its binary companion. From a hypothetical planet orbiting B, Alpha Centauri A would appear as an extremely bright star (about magnitude -21), roughly 200 times brighter than our full Moon.