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HD 21145


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관련 글

A photometric study of wide visual double stars. III - Wide visual double stars with F-type primaries
Fifty-one wide visual double stars with F-type primaries have beenobserved in the uvby, H-beta system. MK class, color excess, absolutemagnitude, effective temperature and distance have been derived fromcalibrations of the above systems. From the distances derived here andthe astrometric data, taken from the literature, it appears that atleast 75 percent of them can be 'physical pairs'. Nevertheless, about 33percent of the double stars in this sample seem to have a realseparation of their components larger than 0.01 parsecs. That means thatthese stars are not gravitationally bound, but they have a commonorigin. For this season, the values of their astrophysical parametersare usually very close together.

Double stars of equal components.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&A....18..341S&db_key=AST

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관측 및 측정 데이터

별자리:화로자리
적경:03h23m57.29s
적위:-26°12'58.1"
가시등급:8.195
거리:83.264 파섹
적경상의 고유운동:-38.4
적위상의 고유운동:10.8
B-T magnitude:8.698
V-T magnitude:8.237

천체목록:
일반명   (Edit)
HD 1989HD 21145
TYCHO-2 2000TYC 6449-1322-1
USNO-A2.0USNO-A2 0600-01341549
HIPHIP 15833

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