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

HD 177878


내용

사진

사진 업로드

DSS Images   Other Images


관련 글

Photometric variability in chromospherically active stars. III - The binary stars
Differential UBV photometry of 49 late-type chromospherically activebinary stars has been obtained. A total of 12,353 differential UBVmagnitudes have been acquired and are used to determine seasonalphotometric periods, amplitudes, mean brightnesses, maximum spotamplitudes, 'unspotted' differential magnitudes, and times of minimumlight. Standard Fourier techniques are used to investigate the cause ofthe light variability. Eight stars are found which exhibit lightvariations due not to spot activity but rather to ellipticity and/orreflection effect. Others show combinations of all three effects. Someof the systems also show substantial differences between theirrotational and orbital period.

새 글 등록


관련 링크

  • - 링크가 없습니다. -
새 링크 등록


다음 그룹에 속해있음:


관측 및 측정 데이터

별자리:거문고자리
적경:19h05m12.27s
적위:+31°26'21.1"
가시등급:7.723
거리:558.659 파섹
적경상의 고유운동:-1.4
적위상의 고유운동:-2.8
B-T magnitude:9.009
V-T magnitude:7.83

천체목록:
일반명   (Edit)
HD 1989HD 177878
TYCHO-2 2000TYC 2640-1565-1
USNO-A2.0USNO-A2 1200-10456177
HIPHIP 93738

→ VizieR에서 더 많은 목록을 가져옵니다.