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

HD 27994


내용

사진

사진 업로드

DSS Images   Other Images


관련 글

Ca II H and K filter photometry on the UVBY system. I - The standard system
A fifth filter (fwhm = 90 A) centered on Ca II H and K has beendeveloped for use with the standard uvby system. The filter, called Ca,is designed primarily for applications to metal-poor dwarfs and redgiants, regions where the uvby metallicity index, m(l), loses somesensitivity. An index, hk, is defined by replacing v in m(l) by Ca. Theeffects of interstellar extinction on the index are modeled anddemonstrated to be modest and relatively insensitive to spectral type.Observations of V, (b-y), and hk for 163 primary standards are detailedand transformed to the standard V and (b-y) system. A qualitativeanalysis using only the primary standards indicates that hk is moresensitive than m(l) over the regions of interest by about a factor of 3.

새 글 등록


관련 링크

  • - 링크가 없습니다. -
새 링크 등록


다음 그룹에 속해있음:


관측 및 측정 데이터

별자리:조각칼자리
적경:04h23m21.83s
적위:-41°14'54.7"
가시등급:8.778
거리:374.532 파섹
적경상의 고유운동:4.7
적위상의 고유운동:3
B-T magnitude:10.857
V-T magnitude:8.95

천체목록:
일반명   (Edit)
HD 1989HD 27994
TYCHO-2 2000TYC 7581-1296-1
USNO-A2.0USNO-A2 0450-01507594
HIPHIP 20479

→ VizieR에서 더 많은 목록을 가져옵니다.