시작하기     To Survive in the Universe    
Inhabited Sky
    News@Sky     천체사진     컬렉션     포럼     Blog New!     질문및답변     출판     로그인  

HD 157809


내용

사진

사진 업로드

DSS Images   Other Images


관련 글

ICCD speckle observations of binary stars. III - A survey for duplicity among high-velocity stars
An analysis of speckle interferometry data for 182 stars has resulted inthe detection of 10 binaries, four of which are newly resolved systems.After correcting for selection effects, the data are found to becompatible with a total frequency for high-velocity long-period doubleswhich is as large as that for low-velocity stars. Based on spectroscopicparallaxes and visual magnitudes, these binaries are found to be within100 pc of the sun, with eight having linear separations of less than 20AU. Four of the binaries are determined to have periods of less than 20yr.

새 글 등록


관련 링크

  • - 링크가 없습니다. -
새 링크 등록


다음 그룹에 속해있음:


관측 및 측정 데이터

별자리:뱀주인자리
적경:17h25m17.42s
적위:+06°05'41.9"
가시등급:9.094
적경상의 고유운동:-50.4
적위상의 고유운동:-54.4
B-T magnitude:10.103
V-T magnitude:9.178

천체목록:
일반명   (Edit)
HD 1989HD 157809
TYCHO-2 2000TYC 413-309-1
USNO-A2.0USNO-A2 0900-09759153

→ VizieR에서 더 많은 목록을 가져옵니다.