Almaak
HIP 9640; Gamma1 And; 57 And
Sep: 9.6", Companion: mag 5.0
물리적 특성
위치 & 식별자
가시성
사용자 설정에서 관측지를 설정하세요 가시성 데이터를 확인할 수 있습니다.
다중 항성계
접안렌즈 시야
Sep: 9.6″ · PA: 63° · 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…
Almaak 소개
설명
Almach is one of the finest double stars in the sky at magnitude 2.26 in Andromeda. A small telescope reveals a gorgeous pair — a golden-orange giant (K3IIb, magnitude 2.3) and a blue-white companion (magnitude 5.0) separated by about 10 arcseconds. Located about 355 light-years from Earth, the fainter companion is itself a triple star, making Almach a quadruple system.
관측 팁
Almach lies at the eastern end of the main chain of Andromeda stars. It is one of the showpiece double stars of the autumn sky — even a small telescope reveals the striking color contrast between the golden primary and blue secondary. The pair is reminiscent of a miniature Albireo. Best observed September through February.
역사
The name Almach (or Almaak) comes from the Arabic 'al-'anaq al-ard,' meaning 'the caracal' (a type of lynx). The double star nature was first noted by Johann Tobias Mayer in 1778. Almach has been a favorite target of visual double star observers for over two centuries.
재미있는 사실
Almach rivals Albireo as the most beautiful color-contrast double star in the sky. The warm orange and cool blue pairing is immediately striking, and many observers consider it even finer than Albireo due to the smaller separation and greater brightness of the primary.