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HD 221684


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관련 글

Some enigmatic binary stars. I
Historical measurements of components of binary star systems at timesexhibit evidence for incompatible interpretations. A short period andstrong eccentricity can equally be a long period with feebleeccentricity. Furthermore, measurements have been made indicating bothdirect and retrograde motions of the components. It has sometimes beenfound that the observations of contradicting evidence have been made ofa second binary system near the system first measured. Note is taken ofthe objects ADS 1959 - A 1818, ADS 2051 - HU 539, ADS 5515 - A 512, ADS5671 - BU 1022, ADS 6001 - A 1963, and ADS 7550 - A 2561, which maypossibly be combinations of two or even three binary clusters observedat different times. Tables are presented of data thus far measured ofeach system.

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다음 그룹에 속해있음:


관측 및 측정 데이터

별자리:물고기자리
적경:23h34m14.43s
적위:+02°18'05.5"
가시등급:9.46
적경상의 고유운동:81.7
적위상의 고유운동:-18.2
B-T magnitude:10.377
V-T magnitude:9.536

천체목록:
일반명   (Edit)
HD 1989HD 221684
TYCHO-2 2000TYC 585-48-1
USNO-A2.0USNO-A2 0900-20437822

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